Heuer production numbers

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is there any documentation on production numbers for various models during the 70's?
 
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is there any documentation on production numbers for various models during the 70's?

No, nothing exact. Mark Moss has done some work on working through which reference numbers correspond to which years for some models, but you have to make some broad assumptions. His work for the Carrera shows us a range of ~30-75,000 watches in total.