: It seems unlikely, but nothing is impossible...

: Looking at http://onthedash.com/docs/ChronomaticMovements.html ,
: the Cal 12 didn't appear until late 1971, by which time you'd
: expect 2nd execution hands to be the norm.
: Do you have any pictures? Can you get the serial number off the
: case?

: I have a 1153S with serial 1911xx, 2nd execution hands (and dial, I
: think, though I'm not sure what the differences were between 1st
: and 2nd execution dials), very like this one:
:
: http://www.onthedash.com/Guide/_Chronographs/63.Carrera/e.Automatic_Early/b.Ref_1153/f.1153S_Second/
: and it has a Cal 11.

Thanks ewand.

I will try to get the case serial number.

What made me think is that the OTD Master Reference Table lists 69, 70/71 and 72 catalogue dates for this combo. So was it manufactured and sold along with later executions? Well, as you said, back then not much was impossible. Especially considering the problems with early cal 11.

Cheers

Mathias