Lets have a look at the movement :

Ref. 4940 case back

Behind the solid case back, there is a carefully finished movement


Nice details with blued screws.


I would have assumed that it is based on an A. Schild movement, that has been used on other watches with second time zone and alarm. I remember that there was a Maurice Lacroix around which also featured alarm and time zone. Also the crown position was identic.
Does anyone have detail information about the movement?
Stefan