![]() ![]() ![]() The calibre 12 was introduced in 1971 and was produced until 1980. It was revealed to the press on Main press conferences in NewYork and Geneva and was manufactured until about 1973. The Heuer calibre 12 movement was a development of the calibre 11 which preceded it, and the calibre 11 was developed by the ‘Chronomatic’ partnership of Heuer, Breitling, Hamilton-Buren and Dubois-Depraz in an attempt to be the first to the market with an automatic winding chronograph. I’ve serviced a few calibre 12 Heuers but have never posted about one yet (although I have posted about a Thermidor which used a calibre 12 Kelek movement), so when this one came in I made a mental note to do so. ![]()
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