It's a 17''' SAV (savonette) PS (petite seconde) caliber Has already been said the pocket watches which houses this caliber.. If you want to find the same antique and traditional design in a PP wrist movement, you have to look the 12-120 caliber... I thin
Closest reference number that looks like the above is ref 1461. The lugs are more tear drop shaped.Actually ref 1595 or 1571 are closer in shape. Agree that an original dial is always preferable. I was offered a SS model with a redial. Passed on that. Rat