Patek Philippe. A gentleman's fine and rare 24 hour and world time wristwatch with two crowns

SIGNED PATEK PHILIPPE & CO., REF. 2523/1, MOVEMENT NO. 724314, CASE NO. 313048, 1954

Details

Patek Philippe. A gentleman's fine and rare 24 hour and world time wristwatch with two crowns
Signed Patek Philippe & Co., Ref. 2523/1, movement No. 724314, case no. 313048, 1954
The nickel plated movement jewelled to the centre with gold alloy balance and micrometer regulation, adjusted to heat, cold, isochronism and to five positions, Calibre 12-400 and Geneva quality seal, the engine-turned silver dial plate with raised gold baton numerals and gold hands, inner rotating 24-hour ring shaded to represent day and night, rotating once in 24 hours and adjusted by the winding crown, outer silvered rotating ring with 41 cities of the world adjusted by the second crown, in circular case with faceted lugs and snap on back, maker's leather strap and gold buckle, case, dial and movement signed
36 mm. diam.

Lot Essay

Louis Cottier invented this complicated fully adjustable world time system and production of a small series of this model began in 1953. The principle of the mechanism is that the 24 hour ring rotates anti-clockwise once in 24 hours so that the time indicated on the dial face, for example, 2.00 p.m. is indicated as 1400 hours at 12 o'clock on the 24 hour ring. The wearer adjusts the outer ring until his location is shown at 12 o'clock. The current time at all the other locations is then set correctly.

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