Great offer here on OF for a beautiful vintage early Heuer GMT, really appreciate the offer. The offered watch is IMHO not an MK1, not from the serial number and not from the dial Layout.
The MK1 was in the range of serial no. 108xxx to 111xxx (see Chronocentric Archive) and had a different dial the so called shourt fourty dial, See bellow.
So your nice piece should be a MK2 piece (see reference table from Jeff Stein) and thats ok.
GLWS
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