Chaika 2M Chajka IIM USSR half-frame scale-focus camera BelOMO for parts

Chaika-2M
vintage Soviet scale-focus half-frame film camera
35mm, s/n 2138214, BelOMO, USSR 

Sold as not working (for parts). The only working shutter speed is 1/250 sec, shutter speed disc is blocked at that position. Shutter cocking lever does not return at "ready" position after cocking and has a backlash. Body has signs of age and use. Frame-counter does not work. Take-up spool is damaged (see the last photo). Lens is not included.