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2446C reference number query

Hi all,

Thanks for your help and advice thus far, you guys have been great.

Am looking at a friend's Autavia 2446C (manual wind compressor back, non GMT version). However the serial number on it is 129xxx.

Looking at the reference table on this site this puts it in range for an Autavia GMT. I should be expecting 108xxx or 109xxx?

Does this make it a frankenwatch? Would this be a deal breaker for you, or is sharing the same case across models OK for vintage Heuer collecting?

Thanks all!!

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