Watches of this vintage could be of either 2209 or 2409 variety. The 24 series is still being produced and new parts are still available from meranom in Russia. The 22 series is archaic .parts must be cannibalized from other movements. These can be purchased by the bushel online. CHEAP.
I am a newbie in watch repair. Recently bought a zim 2602 watch, it produces strange noise, and stops. The volume of the noise depends on the position of the watch, tends to stop rather in face up position. My guess was that the hairspring touches something, but I wasn't able to prove that visually. I attach a file about the sound it makes and a pictures. Thank you any help.