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Vintage Heuer Discussion Forum
The place for discussing 1930-1985 Heuer wristwatches, chronographs and dash-mounted timepieces. Online since May 2003. | ||||||
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Hello !
I can answer about difference between Cal.11 and Cal.12.
The Cal.11 are much much rare than Cal.12s which was only been produced very small amounts in a year or less... (ca.1969-1970's) and "Ticks" 18'000 beat per minutes. it has No gold plateted parts which are Baseplate, Bridges etc..
The Cal.12 has been produced in many many years. modified version of Cal.11. and it "Ticks" 21'600 per minutes and Baseplate and Bridges are gold plated.
You can normally tell the difference from the Baseplate and Bridges which are gold plated or not, because it's not easy to mesure the beat per minutes for us on the netz...
here is Cal.11 photo of my "Siffert"
Good Luck !
Regards,
Kaz
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