Thread: Rolex hallmarks explained, identifying authentic rolex precious metal parts
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Old 18 May 2020, 12:30 AM   #55
Kigan
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Watch: Blancpain AC01
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Quote:
Originally Posted by Teamnguyen View Post
What does the “12” hallmark mean?
The key means that the case manufacturer is located in the canton of Geneva.

#12 - Rolex Industrie SA (case manufacturer ex-GENEX SA), Chene-Burg, Switzerland.
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