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. was very good about explaining what I was getting myself into. I still bought it.
From what I can tell the cal is a 23-7. No reference to it anywhere. The set bridge...nothing either. But the balance and hairspring are good as is the rest of the movement....just not the mainspring barrel.
A nice little 15 jewel adjusted movement. This is the issue though.....
The mainspring barrel is 3 pieces. The cap, the barrel, and this brass ring that has the teeth.
The ring has split. There is no evidence that it was ever attached permanently in any way to the barrel. So it had to have had the barrel pressed down into the ring and all held together by friction.
So now the task goes to my father in law. He said he would give it a try and see what he can do. The ends of the ring need to be welded back together. The only other solution would be to find a way to solder the ring to the steel barrel. He said it could be done but I want to see if we can go with the original way it was made.