really interesting on yours is the logo, exactly the same proportions than on the manual wind autavias.
Fantastic watch with various transitional aspects, early dial with steel markers, already black inserts on hands and the case would be a gen 3 with the rounded pusher cutouts.
Attached is a photo of a gen 2 succesor of the chronomatic, interesting on this one is that swiss is missing on top of the date window.

Cheers

Arno
www.heuerchronographs.com

: Hello Arno,

: Thank you for your compliment.

: I also do like the earlier style dial with steel markers and
: smaller hands...and I still miss the original
: "Chronomatic"...

: Here is my favourite Siffert (as seen in the top right in
: group-picture)
:
:

: Alas I cannot perform perfect case finish...

: Cheers,
: Abel.