Swiss Watch Fair 1972 BF 128
The high frequency (36,000 v.p.h.) automatic movement of this watch runs in a vacuum and is lodged in a case made from a 77-carat synthetic ruby. The dial is protected by a synthetic sapphire crystal The model is consequently fully scratchproof (save by a diamond). Just as famous coach-builders work for the most prestigious names in the car industry, this model - created by specialists in technical design - is sold under a number of major brand names. (VACUUM CHRONOMETER)
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