Ciao Albi,

Many thanks for your answer.
The hands question is clear to me now,
are there early and later execution wearing different hands style ?
I am guessing steel hands are early, Bund painted style later, am I guessing right ?

Regarding the sub dial at 9, the way it works is clear now.
Is this sub dial "made" with an integrated part (i.e separated part from the dial which would be attached to the movement and would come in a hole made in the dial) rotating on itself ?
Or is this the needle which rotates as on any regular chrono ?

As it comes to the movement, is it a regular V721 or as I believe is it a modified 721 ?

Also, I've seen engraved case back on these and case back with no engraving, which one is the correct one ?
Again, any variations related to this detail ?

Both yours and David's are absolute beauties and are in my hard drive for many months...

Andrew, would you have a couple of pictures to share ?

cheers, Laurent