Reference:5517
Submariner → 5517
The 5517 is the MilSub — collector shorthand for 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 puts 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. The 5513 was also used by various military forces, but those were standard commercial watches procured through military channels. The 5517 was purpose-built for British military diving use with specifications that do not appear on any retail Submariner. Fixed bars (spring bars soldered in place so they cannot be removed), a 60-minute bezel (minute gradations all the way around), a T SWISS T tritium dial, and military caseback markings are all features driven by Ministry of Defence requirements rather than Rolex commercial design.
The 5514 (COMEX) and the 5517 (MilSub) are the two major non-retail branches of the 5513 era, and they are distinct. The 5514 is civilian-professional, issued to a French commercial diving company; the 5517 is military, issued to the Royal Navy.
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 still shows its 5513 roots in the lug engraving format. That is one of the clearest reminders that the 5517 begins as a military adaptation of the commercial case rather than as an entirely separate case family.
Collector documentation places Batch 1 in the 3M–4M serial 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 carry both engraving styles on the same caseback, the 5513 markings between the twelve lugs and the 5517 stamp below the seven lug simultaneously. That 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, fits the Batch 2 transitional character.
Collector documentation places Batch 2 in the 4M–5M serial 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 the broadsword hands most collectors now picture when they think MilSub. That is the visually decisive late form of the reference.
Collector documentation places Batch 3 in the 5M–6M serial range, consistent with late-1970s production (approximately 1977–1980).
The serial bands above are collector-documented approximations derived from cross-referencing auction records, private sales, and reference catalogues rather than 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 auction catalogues and represent the best current collector understanding, not exact factory-record boundaries.
Movement notes
The 5517 movement remains disputed. Published source work leans toward cal. 1520, while some forum collectors argue for 1570. Until more direct movement evidence surfaces, both readings stay alive.
Dial map
T SWISS T designation
The 5517 dial carries the T SWISS T designation — the letter T before "SWISS" and again after it at the bottom of the dial. Both T markers indicate the dial contains a tritium radiation source, the radioactive isotope used for watch luminescence in this era. The dual-T designation was legally required under UK regulations for tritium-lumed watches. T SWISS T distinguishes the MilSub dial 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" above 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, rather than by a completely different dial design.
Maxi I dial
The strongest direct lot in the package — Sotheby's 2023 — describes a Maxi I dial. Maxi here follows the same logic as the 5513 Maxi era: enlarged lume plots for improved legibility, late in matte-dial production. The 1978 production date is consistent with Maxi I placement on the 5513 timeline.
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 does not appear on any retail Submariner. This is the most immediately recognizable MilSub feature.
Case, bezel, crystal, and crown
Fixed bars
Fixed bars are the key structural identifier. The strap bars are soldered permanently to the case rather than using removable spring bars, preventing accidental strap detachment underwater — a critical safety feature for military diving. The bars are sized for NATO-style fabric strap pass-through rather than 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, giving the diver minute-by-minute elapsed-time tracking for decompression timing. It was a Ministry of Defence specification requirement and 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.
Rolex Forum collectors frame the dual-engraving structure cleanly: "Rolex inside the caseback, Navy outside." Rolex reference and production markings appear on the inner caseback, while military identification — broad arrow, circled T, NATO stock numbers, and service numbers — appears on the outer caseback. This inside/outside split is consistent across all batches and is the first thing to check when evaluating a claimed 5517.
The broad arrow is the British government property mark, stamped into the outer caseback and appearing 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. Either history is possible, but the broad arrow itself is never a civilian or retail marking.
The circled T is the UK legal requirement under the Radioactive Substances Act for tritium-containing items. On most examples the circled T appears alongside the broad arrow, establishing both military ownership and regulatory compliance under British law.
Many MilSub examples show a NATO stock number beginning with 0552, the Ministry of Defence procurement prefix, and a correctly formatted 0552 prefix is consistent with authentic MOD procurement. 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, and 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 strap continues beneath the watch even if one bar fails, preventing loss of the watch underwater. Packaging followed 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. They represent the earliest military-specific Submariners in the 5517 program.
Authentication warning
The 5517 is one of the most faked Rolex references in existence. 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.
Rolex Forum collectors stress three checks on any 5517 purchase. 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 who can read fixed-bar construction, caseback engraving depth and consistency, bezel graduation quality, and hand proportions against genuine military specification. Cross-referencing against known examples — with only about 180 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. Rolex Forum collectors have documented specific examples of fraudulent conversions appearing at auction and through private dealers. The authentication burden should be treated as the most important step in any 5517 transaction.
Historical market and auction record
Three major auction results establish the 5517 as a consistent six-figure reference across different examples.
At Sotheby's in November 2023, a 5517 MilSub c.1978 sold for 482,600 CHF and reset the auction ceiling for the reference. That result is now the clean market anchor for a full-spec late watch.
Sotheby's November 2018: a 5517 c.1978 sold for 218,750 CHF, documented with caliber 1520, military issue numbering, and a Rolex presentation case. Estimate was 150,000–300,000 CHF.
Sotheby's December 2019: a 5513/5517 c.1974 sold for $262,500. The lot bridges the 5513 and 5517 designations, consistent with the transitional Batch 1 and Batch 2 examples where 5513 and 5517 markings coexist.
Three auction results above $200,000 in their respective currencies, across a five-year window, for a watch produced in roughly 1,200 units with only 180 accounted for. The scarcity arithmetic is simple and severe. 180 documented out of approximately 1,200 produced means the majority of MilSub production is destroyed, lost, or sitting undiscovered. 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 several things at once: genuine military provenance (not a retailer's stock watch), period-correct tritium lume aged naturally over five decades, physical specification unavailable on any retail watch (fixed bars, 60-minute bezel, broadsword hands), and the 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 runs on 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
- The Vintage Rolex Field Manual — Colin A. White, Morning Tundra
- History of the Rolex Submariner - Part 2, The 55XX References and 1680 Date — Tom Mulraney, Monochrome
- Inside Mike Wood's 'For Exhibition Only': A Private Rolex Collection On Limited Display — Tim Vaux, Hodinkee
- Full Spec Military Submariner, Reference 5517, Circa 1978 — Sotheby's, Sotheby's
- MilSub Submariner, Ref 5517, Stainless Steel Military Wristwatch Made for the British Armed Forces, Circa 1978 — Sotheby's, Sotheby's