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A valuable text from 《Profile: Jean-Pierre Hagmann, Case Maker Extraordinaire and a Legend in His Own Time》
A professed classic motorbike enthusiast, Mr Hagmann still goes to his Geneva workshop daily – the vocation is a passion for him – but he has sold the enterprise to Vacheron Constantin. Each morning he turns up at 7am to pass on his case making expertise to a Vacheron Constantin engineer.
Poinçons de Maître, GENEVA Key, No.27
When I was sorting out the data today, I found several vintage V&C which used caliber 458, the case manufacturer is GENEVA Key, There were diamond-shaped hallmarks on the inside of the case, and I don't find any other Swiss watchmaker from the same perio...
Responsibility Mark vs Trade Mark
Your symbol resembles the letter K which may be related to the name Klauber. Here is the trade mark from an Ignace Klauber clock circa 1920s. Catawiki Finding more Key 27 cases with this symbol will strengthen the theory it was Klauber's or successors tra...
Search out the 2016 article
at Watches by SJX on the case maker Jean-Pierre Hagmann, who received his training at Gustave Brera, successor to Klauber.
A valuable text from 《Profile: Jean-Pierre Hagmann, Case Maker Extraordinaire and a Legend in His Own Time》
A professed classic motorbike enthusiast, Mr Hagmann still goes to his Geneva workshop daily – the vocation is a passion for him – but he has sold the enterprise to Vacheron Constantin. Each morning he turns up at 7am to pass on his case making expertise ...
