Dating a vintage Heuer by serial/case number?

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Please forgive a noob question... expanding interest from Omega - where dating is possible with reasonable certainly from the movement number, - to Heuer, and wondering if there any relationship between a Heuer serial/case number and date of production? Any pointers much appreciated😀

With thanks,
Martin
 
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You can roughly date a Heuer to the year, but that's about it I'm afraid. Generally, serials reached the 6 digits sometime in 1969 and up til then it's not too difficult, but afterwards it starts to get a little harder.
 
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Thanks Adam

Are there ranges documented anywhere that provide that rough dating - eg identify serial as from around, say, 1970 versus 1972? Assume higher the number the later the production across all models…👎
 
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Thanks Adam

Are there ranges documented anywhere that provide that rough dating - eg identify serial as from around, say, 1970 versus 1972? Assume higher the number the later the production across all models…👎

Not really, especially as batch production became much more commonplace after the Chronomatic models were introduced. 1970 would still have been in the lower 6-digits though whereas by 1972, we see 2xxxxx serials.