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Lot No. 476 (89th Auction)
Rolex "Oyster Perpetual Tru-Beat Superlative Chronometer officially certified", Movement No. N823518, Case No. 138744, Ref. 6556, Cal. 1040, 34 mm, circa 1956

A gentleman's extremely rare automatic Geneva wristwatch with jumping centre seconds - original box
Case: steel, screw back, screwed "Twinlock" winding crown, folded steel "Oyster" bracelet ref. 7835/19. Dial: silvered, applied indexes, luminous baton hands. Movm.: rotorwind movement, ground, rhodium-plated, 6 adj., 26 jewels, Glucydur screw balance, shock protection for balance.


Ref. 6556
The reference 6556 was produced predominantly in stainless steel with a very few examples in gold. The 1960 catalogue stated that the system was be replaced by the new reference 1020 but this was never launched. The interesting extra mechanism for the independed jumping seconds is made of beryllium and composed of a lever that allows the seconds wheel to jump, therefore allowing the usual going seconds hand with a beat of 18,000 to beat once per second. Illustrated and described in "Rolex, Collecting Wristwatches", by Osvaldo Patrizzi, 2001 Edition, p. 194-197.

to be sold without reserve
Estimate  5,500 - 10,000 €
This is a lot of a former auction!

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