Reference:Movements: Difference between revisions
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A260 powered the first Submariner references, 6204 and 6205, from 1953 to 1955. "A.260" is Rolex's size-family code for this movement class, comparable to the Prince family's "T.S." code. Its non-butterfly rotor distinguishes it from the butterfly-rotor Cal. 1030. Hodinkee traces A260 to a movement used in earlier Oyster Perpetuals and later Bubblebacks, predating its Submariner fitment. The registry uses 17 jewels; some auction descriptions give 19, so the count should be checked against the individual movement. | A260 powered the first Submariner references, 6204 and 6205, from 1953 to 1955. "A.260" is Rolex's size-family code for this movement class, comparable to the Prince family's "T.S." code. Its non-butterfly rotor distinguishes it from the butterfly-rotor Cal. 1030. Hodinkee traces A260 to a movement used in earlier Oyster Perpetuals and later Bubblebacks, predating its Submariner fitment. The registry uses 17 jewels; some auction descriptions give 19, so the count should be checked against the individual movement. Auction catalogues use both labels on ref. [[Reference:6106|6106]] examples: Monaco Legend identifies case 803400 as A260, while Antiquorum names Cal. 645 in a separate 6106. These are specimen-level attributions, consistent with A.260 as a size-family code rather than a unique commercial caliber name. | ||
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