Omega Speedmaster Ref 17500321 a stainless steel chronograph watch with bracelet. Dial: black. Calibre: cal. 3220A automatic, 47 jewels. Case: brushed and polished stainless steel tonneau-form, snap on back. Case number: 55599785. Closure: brushed stainless steel 1469 Omega link and folding clasp. Dimensions: 1.54 in., bracelet cricumference approximately 6.30 in. Signed: case, dial and movement. Accessories: original Omega swingtag, generic black leather watch strap
- 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.
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