OMEGA, Speedmaster, chronograph, "CB Case".

OMEGA, Speedmaster, chronograph, "CB Case"

Case size: 42 mm
Material: steel
Movement: manual, caliber 321
Year: circa 1966
Crystal: plastic crystal
Bracelet: original bracelet, folding clasp, ref. 1171/633
Reference number: ST 105.012
Serial number: 24959639
Case number: 105.012-66 (C.B)

Replaced dial and hands, later bracelet.
Please keep in mind that an overhaul might be needed, since no service history is available.

More information

Original receipt dated 1971 included.
Service paperwork dated August 25th 2015 included.

The CB cases differ in that there is a small line between the polishing planes on the lugs. All the case backs have a single step.

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