Case size: 36 mm
Material: 18K gold
Movement: automatic, caliber 1555
Year: circa 1963
Crystal: plastic crystal
Bracelet: President bracelet, folding clasp, ref. 64
Reference number: 1803
Serial number: 989'828
Movement number: D'D97'146
Case number: 1803
Overall in good vintage condition. Bracelet shows stretch consistent with age. Wear due to age and use. A simple function check indicated the movement runs; accuracy, power reserve and long-term performance have not been tested and servicing may be required at the buyer’s expense. Water resistance cannot be guaranteed and should be checked by a qualified watchmaker before any exposure to water. Pictures of the movement are available upon request. No right of withdrawal applies to live auction purchases.
More information
The Three Crowns (Cat's Paw): the Swedish Gold Hallmarks, sometimes known as the "cat's paw" (kattfot), signifies that the piece meets the legal standard for gold.
Early examples of the Ref. 1803 were fitted with the upgraded calibre 1555, featuring a free sprung Micro-Stella balance but lacking a quickset function. Adjusting the weekday and date required advancing the hands past midnight repeatedly until the correct indications were reached.
By the mid-1960s, the movement was updated to calibre 1556, which operated at a higher frequency of 19,800 vibrations per hour and included an additional jewel, bringing the total to 26, though it still did not offer a quickset mechanism. In 1972, the calibre 1556 received a further improvement with the addition of a hacking function, allowing the seconds hand to be stopped for more precise time setting.
These movements marked the first fully in-house calibres used in the Day-Date, replacing earlier outsourced mechanisms.
For condition report contact specialist
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