This item has been sold, and the description, image and price ($US) are for reference purposes only.
An Omega Speedmaster chronograph wristwatch, automatic movement and date, circular black dial with baton numerals, three subsidiary dials and date at three, calibre 1164, case reference 1780055, signed case, dial and movement, stainless and black enamel case and bracelet brands, 1.57 in. diameter

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  • Date Aperture - A date aperture is a cut out section in the face of a watch or clock, displaying the day of the month.
  • Chronograph - A chronograph is a watch that also incorporates the features of a stopwatch, to measure elapsed time. Most chronographs are operated by two buttons, one to start and stop the chronograph second hand, and the other to return that hand to the starting position.
  • Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
  • 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.

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An Omega Speedmaster chronograph wristwatch, automatic movement…