The FED 4 rangefinder camera was produced by the FED factory in Kharkov, Ukraine from 1964 to 1980.
Frame size is 24x36mm. It features Shutter Speeds of 1/500 to 1s + 'Bulb'.
Its main improvment over the FED 3 is its added selenium light meter.
Comes in two versions, Type 1 & Type 2; type 2 has an additional cocking lever and comes in 3 variants each with slight cosmetic changes.
The camera is a veritable beast, seemingly carved out of a huge chunk of metal - it's also quite large; it doesn't give the impression of a camera that will fall apart. This thing is built to last.