Rolex Oyster perpetual day-date Ref 1803 an 18ct gold chronometer wristwatch with day and date, 1969 dial: sunburst champagne, magnified date aperture at 3, arch-form sector for day at 12, baton indexes. Calibre: cal. 1803, automatic. Case: 18k gold tonneau-form with fluted bezel, screw down back. Case number: 1803. Serial number: 2901873. Closure: 18ct gold Rolex mesh bracelet inscribed January 1969, folding clasp. Dimensions: 1.42 in. diameter, bracelet circumference approximately 6.69 in. Signed: case, dial and movement. Accessories: None
- Date Aperture - A date aperture is a cut out section in the face of a watch or clock, displaying the day of the month.
- Baton Numerals - A watch that instead of displaying numerals on the face, displays a marker in the form of a baton, or lower case letter "L". Since the baton-like marks are not numerals, the feature is also called baton markers, baton indexes and baton indicators.
- Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
- Bezel - On a clock or watch, the bezel is the metal frame into which the watch or clock glass is fitted. In clocks, the bezel may include a hinge and a flange, in effect a door to the face of the clock. In jewellery the bezel is a band of metal with a projecting lip that holds the gemstone in its setting.
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