this camera is a Zorki 4K and was made during the period of its normal production years (1972-1980). The pins in the frame sids denotes a camera for aerial purposes aimed for registering target shots from airplanes LP
Mr. L. Paracampo, I forgot to write that the camera, in fact, is a Zorki 4K. Thank you very much for your considerations about this camera. Antonio Savini