Kiev-60 Kiev-6c TTL Pentaprism viewfinder for medium format camera Arsenal USSR

Pentaprism viewfinder with LED display 
for medium format cameras Kiev-6C, Kiev-60
#852105
"Arsenal" plant, Kiev, Ukraine, USSR

Sold as not working (for parts). LEDs and control bulb do not work with fresh batteries installed. Body has signs of age. Can be used as a simple viewfinder. Batteries are not included.

Camera "Kiev-6c" is not included and shown as an example of mount.

This is the demountable TTL-viewfinder for Kiev-6C and Kiev-60 medium format camera. It is equipped with 4 batteries 625A or LR9. There is a switch on the upper side with three positions - "On-Off-Battery test". Inside there is a CdS photoresistor. Device covers photosensitivity from 8 to 500 ISO. Device measures luminance from 1.6 to 13000 kcd/m2. 
It was a default viewfinder for Kiev-6C TTL (produced in 1978-86) and Kiev-60 TTL (produced in 1984-2005).

Inside the viewfinder there are 2 LEDs. When switched on they show whether exposure is optimum or there is over/underexposure. It works on any diaphragm. Rotating the rings on the barrel you get a normal exposure - when both LED's are burning or blinking. Then you set shutter speed and aperture on the camera copying the meaning from the prism. 
It is mounted on the camera with two holes for pins which have a buttons, and one hole has a lock.

Characteristics:
S/number - 852105
Dimensions (mm): 85*94*62
Mass - 467 g