Type b signs:
Wind Lever
Higher Viewfinder
Logo is engraved or silkscreened on a plastic plate
Camera:
Rangefinder camera for 35mm film
Coupled rangefinder/viewfinder
Light meter not coupled
Leica-type shutter
Speed: 1/1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500 and B
Screw Mount M39
Lenses:
first: Industar I-61 "Zebra"
later: Industar I-61L/D black
Lenses accept M 40.5x05mm filters
Prices:
1980 59rub. 50kop
1988 75rub. 40kop
Set included leather case, one film cassette, lens cup, box, and manuals.
Serial #169381 from 25.VIII.1980 (fotoua.com)
Known serial number range (please extend the range with your serials):
7-digit serial number on the backside of the top:
#6504727(fotoua.com) to #8639223(fotoua.com)
It's sad that FED decided to stamp 6-digit serials on the bottom plate of the back door, because those doors can be accidently changed easily.
FED-3, Fed-4 and Fed-5 doors are the same, stamping the serial on the door might have simplified production.
There are big, wide digits (more than 2mm high)
and small, narrow digits (less than 2mm high).
______________________________________________________________________