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Rolex Submariner Date (five-digit)

Reference 16610. A sheet to take with you: the numbers to check the watch against, what to look at, and what to ask. It does not authenticate anything and it does not tell you whether to buy.

Check the numbers

Measure or ask. A watch that does not match these is not necessarily wrong, but it is a question worth the answer.

Anything above marked not recorded is a gap in this catalog, not a property of the watch. Do not read a blank as a zero.

Before anything else

The 16610 is one of the most-replicated watches ever made, and modern replicas are convincing at a glance. Movement inspection and bracelet fit are the two checks that still separate them reliably.

What to look at

1. movement Caliber 3135
   Correct A 31-jewel Rolex cal. 3135 with a free-sprung balance, a full balance bridge rather than a cock, and finishing consistent throughout
   Red flag A generic ETA or Miyota base, a regulated balance with an index, or coarse bridge finishing
2. dial Lume type against the case date
   Correct A tritium dial marked T SWISS T on pre-1998 examples and a Luminova or Super-LumiNova dial marked SWISS MADE afterwards, each matching the case serial
   Red flag A tritium marking on a case serial from the 2000s, or the reverse
3. case Drilled lug holes
   Correct Drilled lug holes on earlier examples and solid lugs on the last of the run, consistent with the serial
   Red flag Lug holes that do not match the period the serial indicates
4. bracelet Oyster bracelet end-link fit
   Correct End links sitting flush against the case horns with no lateral play, and a Rolex-signed clasp with a code consistent with the case
   Red flag A visible gap at the horns, end links that rattle, or an unsigned clasp
5. crown Triplock crown
   Correct Three dots beneath the coronet on the crown face, screwing down smoothly against the tube
   Red flag A crown with the wrong number of dots, or one that cross-threads or feels loose when fully unscrewed
6. crystal Sapphire crystal and cyclops
   Correct A flat sapphire crystal with the cyclops magnifying the date roughly two and a half times
   Red flag Weak magnification, which is a long-standing tell on replica crystals

Known issues on this reference

• High-quality replicas of this reference are widespread and improve every year. A visual check of the dial alone is not sufficient.
• The reference ran for more than twenty years, so parts from different periods are often mixed. Tritium dials in late cases and Luminova dials in early ones are both common.
• Aftermarket bezel inserts are sold openly and are fitted often, since the original aluminium insert fades and scratches.

Parts that are commonly replaced

• Bezel inserts are consumables and are replaced frequently, including with aftermarket parts.
• Clasps and end links wear and are commonly swapped; confirm the Rolex markings on both.

Ask the seller, whatever the watch

• When was it last serviced, by whom, and is there paperwork?
• Has the case ever been polished?
• Which parts are not original to it?
• Do you have the box, papers and the original bracelet or strap?
• Why are you selling it?
• Can I see it in daylight, and can I take a photo of the caseback?

What this sheet is standing on

The specifications above are sourced to sothebys.com, bonhams.com. What else the catalog does not know.

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