Reference:5517

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Submariner → 5517

The 5517 is the MilSub — the British military Submariner, purpose-built for the Royal Navy and never sold through any retail channel. Approximately 1,200 units were produced; only around 180 are accounted for in collector databases. When a 5517 surfaces at auction, it is an event: a 1978 example sold at Sotheby’s in November 2023 for 482,600 CHF — the most expensive MilSub auction result on record. That result places the 5517 in the company of the earliest and rarest Submariners despite being a 1970s watch. Military provenance, purpose-built specification, and genuine scarcity do that to collector value.

Core facts

detail value
reference 5517
family Submariner (no date, military-issue)
distribution Royal Navy (British military), no retail
movement caliber 1520 (disputed; forum collectors argue 1570)
case 40mm, fixed bars (soldered, non-removable spring bars)
crystal acrylic
bezel 60-minute (full-minute markings around entire bezel)
dial T SWISS T designation (tritium)
caseback broad arrow, circled T, military service number
hands Mercedes (early batches), broadsword/plongeur (Batch 3)
total production approximately 1,200 units
accounted for roughly 180 examples

Where it sits in the line

The 5517 sits outside the ordinary retail no-date Submariner line. While the 5513 was also used by various military forces, those were standard commercial watches procured through military channels. The 5517 is different: purpose-built for British military diving use with specifications that do not appear on any retail Submariner. It belongs to the military issue story, not the commercial ladder.

The 5514 (COMEX) and 5517 (MilSub) are the two major non-retail branches of the 5513 era, but they are distinct: the 5514 is civilian-professional (French commercial diving company), the 5517 is military (Royal Navy). Fixed bars, 60-minute bezel, T SWISS T dial, and caseback markings are all features driven by Ministry of Defence requirements rather than by Rolex’s commercial design choices.

Production outline

The 5517 was produced in approximately three batches, each with distinct identifying features. Total production was roughly 1,200 units. Of those, approximately 180 have been accounted for in collector databases and auction records — meaning the majority of production is either lost, destroyed through military use, or sitting in undiscovered collections. That scarcity arithmetic is a core part of why the watch commands the prices it does.

Batch 1: 5513 case engravings between 12 lugs

The first batch carries case engravings in the 5513 format, positioned between the twelve-o’clock lugs. These earliest 5517 examples are essentially 5513 cases with military modifications — sometimes listed in references as 5513/5517 hybrids — and the engraving placement reflects the 5513 origin of the case. Caseback markings on Batch 1 examples include the broad arrow (British MOD property mark) and the circled T (tritium regulatory mark), along with military stores numbers. All three batches carry T SWISS T dials, as this was the legal designation for tritium-lumed dials under UK procurement requirements.

Approximate serial range: collector documentation places Batch 1 in the 3M–4M range, consistent with early-1970s Rolex production (approximately 1971–1974). The exact lower boundary is not established from factory records.

Batch 2: 5513 engravings plus 5517 stamp under 7 lug

The second batch retains the 5513-style engravings between the twelve-o’clock lugs but adds a 5517 reference stamp under the seven-o’clock lug. Some examples show both engraving styles on the same caseback — the 5513 markings between the twelve lugs and the 5517 stamp below the seven lug simultaneously. This dual-marking pattern represents the transition from repurposed 5513 cases to dedicated 5517 production. The Sotheby’s December 2019 lot — sold as a 5513/5517 c.1974 — is consistent with this Batch 2 transitional character.

Approximate serial range: collector documentation places Batch 2 in the 4M–5M range, consistent with mid-1970s production (approximately 1975–1977).

Batch 3: 5517 engravings between lugs with broadsword hands

The third and final batch carries 5517 engravings between the lugs and introduces the distinctive broadsword hands. Broadsword (also called plongeur) hands are wider and more sword-shaped than the standard Mercedes hand, designed for improved underwater legibility. These are the most visually distinctive 5517 examples and the ones most closely associated with the MilSub identity in collector literature. Some Batch 2 examples may also carry broadsword hands, but the broadsword is primarily a Batch 3 feature. The Sotheby’s November 2023 example — described as c.1978 and sold for 482,600 CHF — is consistent with Batch 3 production.

Approximate serial range: collector documentation places Batch 3 in the 5M–6M range, consistent with late-1970s production (approximately 1977–1980).

Important caveat on serial bands: these serial ranges are collector-documented approximations derived from cross-referencing auction records, private sales, and reference catalogues — not Rolex factory data. The Royal Navy never published procurement lists organized by serial number, and Rolex does not confirm military issue dates. The ranges are internally consistent across multiple auction catalogues and represent the best current collector understanding, but they should not be treated as exact factory-record boundaries.

Movement notes

The 5517 movement is a key disputed point among collectors. Published reference sources and both Sotheby’s lot pages in the local package identify caliber 1520 — the long-run non-chronometer caliber that powers the 5513 through most of its production. Rolex Forum collectors argue the 5517 carries caliber 1570, describing it as “a better movement than the 5513 MilSubs’ 1520.” If the forum claim is correct, the 5517 would carry a chronometer-grade movement in a non-chronometer-designated case — an unusual pairing that would distinguish it mechanically from the 5513 base, not just structurally. Both positions should be noted until this is resolved through published caseback or movement documentation across multiple examples: the established reference literature says 1520, while forum research claims 1570.

Dial map

T SWISS T designation

The 5517 dial carries the T SWISS T designation — the letter T appears before “SWISS” and again after “SWISS” at the bottom of the dial. Both T markers indicate the dial contains a tritium radiation source, the radioactive isotope used for luminescence in watches of this era. This dual-T designation was legally required under UK regulations for all watches using tritium as lume material. T SWISS T distinguishes these dials from commercial 5513 examples, which carry the standard country designation without the T markers.

Standard military dial

The 5517 dial carries the “SUBMARINER” model text and, on most examples, “Rolex Oyster Perpetual” text above the center. Most MilSub dials do not carry a depth rating in metric or imperial — the Ministry of Defence did not specify depth-rating text as a dial requirement. The military identity is established by the T SWISS T marking, the caseback engravings, and the structural modifications to the case — not by an entirely different dial design.

Maxi I dial

The strongest direct lot in the package, Sotheby’s 2023, describes a Maxi I dial — a late military dial with larger lume plots, consistent with the late-1970s production date. The Maxi designation follows the same logic as the 5513 Maxi era: enlarged lume plots for improved legibility.

Broadsword hand variants

Third-batch examples with broadsword hands are visually distinct from earlier batches. The broadsword (plongeur) hand is wider and more sword-shaped than the standard Mercedes hand and is not found on any retail Submariner. This is the most immediately recognizable MilSub feature.

Case, bezel, crystal, and crown notes

Fixed bars

Fixed bars are the key structural identifier. The strap bars are permanently attached to the case instead of using removable spring bars. This modification prevents accidental strap detachment underwater — a critical safety feature for military diving operations. The fixed bars are sized for NATO-style fabric strap pass-through, not for standard Oyster bracelet attachment.

60-minute bezel

The 60-minute bezel carries minute gradations all the way around rather than just at five-minute intervals. This gives the diver minute-by-minute elapsed-time tracking for decompression timing. A Ministry of Defence specification requirement. It does not appear on any retail Submariner of the period.

Case engravings and caseback markings

Military issue watches carry specific engravings on the caseback and between the lugs, varying by batch as described above. The primary authentication factor for any 5517 is the presence of correct, matching military markings. Here is what those markings look like:

Forum collectors offer a cleaner framing of the dual-engraving structure: “Rolex inside the caseback, Navy outside.” Rolex reference and production markings appear on the inner caseback surface, while military identification — broad arrow, circled T, NATO stock numbers, and service numbers — appears on the outer caseback surface. This inside/outside split is consistent across all batches and is the first thing to check when evaluating a claimed 5517.

Broad arrow: An upward-pointing arrow — the British government property mark — stamped into the outer caseback surface. This mark indicates Ministry of Defence property. It appears on most 5517 examples. Any broad arrow watch in the civilian market was either legitimately decommissioned through official channels or has an unclear chain of custody — both histories are possible, but the broad arrow itself is never a civilian or retail marking.

Circled T: The letter “T” enclosed in a circle, stamped on the caseback. This is the UK legal requirement under the Radioactive Substances Act for tritium-containing items. On most examples the circled T appears in conjunction with the broad arrow. Together they establish both military ownership and regulatory compliance under British law.

“0552” NATO stock number prefix: Many MilSub examples show a NATO stock number format beginning with “0552” — these are Ministry of Defence procurement numbers that can in principle be checked against known MOD records. Presence of a correctly formatted 0552 prefix is consistent with authentic MOD procurement.

Military service number: An individual service number or unit identifier is often engraved on the caseback, linking the watch to a specific sailor or diving unit. These numbers are the most useful provenance tool — cross-referencing a service number against Royal Navy records (where accessible) is the most rigorous authentication available.

Bracelets, end links, clasps, and packaging notes

Military-issue watches were delivered on NATO-style fabric straps rather than metal bracelets, consistent with the fixed-bar design. The fixed bars are not compatible with standard Oyster bracelet attachment, and the NATO strap pass-through design is deliberate: the NATO strap continues beneath the watch even if one bar fails, preventing loss of the watch underwater.

Military issue packaging follows procurement logistics rather than retail presentation. Watches were delivered in military stores packaging, not standard Rolex retail boxes.

Special branches

Batch 3 broadsword

Third-batch broadsword-hand examples are the most collected and most valuable 5517 variant. The combination of dedicated 5517 engravings, broadsword hands, fixed bars, and 60-minute bezel represents the full-specification MilSub in its most complete form.

Batch 1 transitional

First-batch examples with 5513 engravings show the 5517 before it developed its own identity. These represent the earliest military-specific Submariners in the 5517 program.

Authentication warning

The 5517 is one of the most faked Rolex references in existence. Rolex Forum collectors emphasize this point repeatedly and with good reason: the combination of extreme value (consistently above $200,000 at auction), a relatively simple base watch (modified 5513), and the difficulty of verifying military provenance creates a powerful incentive structure for fraud.

The conversion path is straightforward: take a standard 5513, add fixed bars, swap to a 60-minute bezel, engrave military markings on the caseback, and fit broadsword hands. Each modification is technically achievable by a skilled watchmaker. The result can be visually convincing to anyone who has not handled genuine examples. Forum collectors stress that any 5517 purchase should involve:

  • Provenance verification: a documented chain of custody connecting the watch to a specific Royal Navy unit or service number, verifiable against accessible military records.
  • Physical inspection by a specialist: fixed bar construction, caseback engraving depth and consistency, bezel graduation quality, and hand proportions all differ between genuine military specification and aftermarket modification.
  • Cross-referencing against known examples: with only approximately 180 examples accounted for in collector databases, the community of 5517 specialists is small enough that most genuine examples are tracked.

The fake 5517 problem is not theoretical. Forum collectors document specific examples of fraudulent conversions appearing at auction and through private dealers. The risk is high enough that the authentication burden should be treated as the most important step in any 5517 transaction.

Historical market and auction record

The 5517 has multiple major auction results that establish it as a serious collector reference with consistent six-figure results across different examples.

Sotheby’s November 2023: A 5517 MilSub c.1978 sold for 482,600 CHF — the most expensive MilSub auction result on record. The lot documents a full-spec 1978 5517 with Maxi I dial, matching case and inside caseback number, fixed bars, and military engravings. The estimate was 120,000–180,000 CHF; the result nearly tripled the high estimate. That the specialist auction house — with full access to comparable results — set a high estimate of 180,000 CHF and the market returned 482,600 CHF is itself a data point: even seasoned experts underestimated what collector demand for a full-specification MilSub had become. The c.1978 production date is consistent with Batch 3 serial ranges.

Sotheby’s November 2018: A 5517 c.1978 sold for 218,750 CHF. The lot documents caliber 1520, military issue numbering, and was sold with a Rolex presentation case. The estimate was 150,000–300,000 CHF.

Sotheby’s December 2019: A 5513/5517 c.1974 sold for $262,500. This lot bridges the 5513 and 5517 designations, consistent with the transitional Batch 1 and Batch 2 examples where 5513 and 5517 markings coexist.

Three major auction results, all in the $200,000+ range in their respective currencies, across a five-year window. That is a consistent market for a watch produced in approximately 1,200 units with only 180 accounted for. The scarcity arithmetic is simple and severe: 180 documented examples out of approximately 1,200 produced means the majority of MilSub production is either destroyed through operational use, lost, or sitting in undiscovered collections. Unlike a rare vintage complication where production numbers are uncertain, the MilSub’s rarity is structural — it was made for one client, in limited procurement batches, to be used operationally. Most of these watches had hard lives.

The value drivers are distinct from ordinary vintage scarcity. A 5517 commands prices above $250,000 because it concentrates: genuine military provenance (not a retailer’s stock watch), period-correct tritium lume that has aged naturally over five decades, physical specification unavailable on any retail watch (fixed bars, 60-minute bezel, broadsword hands), and the specific weight of British naval diving operations during the Cold War era. Each factor independently adds value; together they produce results that consistently exceed pre-auction estimates.

The market is driven by batch type, completeness of military documentation, and physical condition. Third-batch broadsword examples in full-specification condition with documented military provenance — service number on caseback, matching inside number, original T SWISS T dial with unpolished case — represent the peak of the MilSub market.

Sources

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