it's the 218 movement.
its an amazing tech for that time..love it, never had one before. I'm used to wear a watch when i sleep..yeah love them so much
, but you can not wear this one at night.
got the bezel off and sanded it with differend grades..still 1 small nick at 8 'o clock. Then buffed it.
The glass is a combination of buffing with the wheel and polywatch.
The case is light sanding with 1600 and light buffing with the wheel.
btw..the green band is as old as the watch..it's one from an old stock and it fits perfect..retro green
thx Abe for the remarkable high zoom pics...so i could explain the wife how these works. you are a real connaisseur