Caliber: 12824 quick-date setting
Case ref: 453 T
Start of production 1972 of this watch but they start earlier with the Anatomic date model.
N.O.S.gold plated 20 Micron case with steel backside, original strap,
signed plated buckle, signed glass.
Hidden crown signed, a model which is a bit more difficult to wind but hidden crowns are also used by many other brands like some Constellations of Omega.
You have to roll the crown with your finger.
It is and was a way to protect the crown.
The model Anatomic is as you can see on the picture
following the rounding of your wrist in the same style as
Omega did with their Dynamics