Thank you Darren for your opinion,

partly I agree with you, but I think it was simpler - in my opinion -
to replace a cronograph plate Cal.14 rather than the Cal.11.

Marco

: Hi Luca, interesting topic you bring up. Lets start with the fact
: that its difficult to come up with absolutes when we discuss
: vintage Heuer, especially in regards to the various transitional
: models.
: It is correct that the very first GMT's with the 1-24 marked bezels
: had modified Cal.11 movements. These were found in a very narrow
: serial range 205xxx. Here is my example which i happen to be
: wearing at the moment
:

: Then we had a short run of red chrono needle GMT's and some of
: these also have the Cal.11 silver coloured movements. But after
: this the execution with the standard black register needles
: & even number bezels we see the gold coloured Cal.14
: movements being the norm.
: I dont recall ever seeing a GMT movement where the two colour
: schemes have been mixed. It could well be that during service /
: repair your movement has received donor parts. With your watch
: being a 225xxx serial my expectations is that it probably
: started life with a full gold coloured Cal.14 movement.

: - Darren