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Rolex Submariner "Big Crown"

Reference 6538. 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

A 1950s Submariner at this value is assembled as often as it is found. Almost every surviving 6538 has had something replaced, so the question is usually which parts are original rather than whether the watch is real.

What to look at

1. crown The oversize winding crown
   Correct An 8mm screw-down crown, noticeably larger than the case flank it sits against, with no crown guards on either side of it
   Red flag A small later crown, or a case with crown guards, which belongs to a later reference and not to the 6538
2. dial Gilt printing and its aging
   Correct Gilt text sitting under the glossy lacquer rather than on top of it, with uneven aging that is heavier near the lume plots
   Red flag Flat, uniform aging across the whole dial, or printing that sits proud of the lacquer surface under a loupe
3. hands Gilt Mercedes handset
   Correct Gilt hands with lume that has aged to the same tone as the dial plots
   Red flag White or steel hands on a gilt dial, or lume in the hands that is visibly newer or a different colour from the dial plots
4. case Inside caseback date code
   Correct A quarter and year code stamped inside the caseback that is consistent with the case serial and with the 1956 to 1959 window
   Red flag A code that post-dates 1959, or a caseback whose code cannot be reconciled with the case number
5. movement Caliber 1030
   Correct A 25-jewel Rolex cal. 1030 automatic, with a movement number and finishing consistent with the case vintage
   Red flag A later Rolex caliber, or a movement whose service parts are clearly newer than the rest of the watch
6. bracelet Riveted Oyster bracelet and end links
   Correct A folded riveted Oyster bracelet with end links stamped to a period-correct number, sitting flush against the case horns
   Red flag A modern solid-link Oyster on a 1950s case, or end links that leave a visible gap at the horns

Known issues on this reference

• Gilt dials from this era are the most-reproduced vintage Rolex component. Service dials fitted by Rolex decades ago are genuine parts but are not original to the watch and are valued very differently.
• Cases are often over-polished, which softens the tonneau flanks and can erase the between-lugs reference and serial numbers entirely.
• The oversize crown is a wearing part. A correct 8mm Brevet crown is frequently missing and replaced by a smaller later crown, which changes the watch the reference is known for.

Parts that are commonly replaced

• Bezel inserts are consumable and almost always replaced. An insert retaining its red triangle is worth confirming against the case date rather than assuming.
• Acrylic crystals are replaced routinely and carry no originality penalty.
• Crown and crown tube replacements are extremely common on this reference and materially change what the watch is.

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 bonhams.com, sothebys.com. What else the catalog does not know.

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