From Sovietskoe Foto October 1995: “New product from “FED” “FED 670” Medium format semi automatic camera with light emitting diode , changeable magazine and plastic body construction. Between the lens shutter; time scales from 1 to 1/250 sec. Magazine can be changed to 6x7 format and for 4,5x6. expected price above 200 rub.” Lens: MC Helios 113 f5.6 65mm Neptun "FED 600" on front panel.
Note: Helios 113 also from FED was a lens 1.8/40 used on FED 35 compact camera. Also an adaptation with M bayonet for Leica with same specifications. they could be seen at: http://www.dvdtechcameras.com/forum/viewtopic.php?t=15