I picked this watch up from a fellow member RonD. because I have a soft spot for unusual and nicely made looking movements. There are a few mentions of MARS in mikrolisk but the one that seemed to fit is the Gallet one. The style of movement and the quality of build are correct. I did find another reference somewhere with the same style of how the hairspring stud attaches is the same as well to another Gallet movement.

So I bought it knowing that the watch had a winding issue and RonD…

MARS\Gallet Unusual Mainspring Barrel