all die cast métal (very heavy : 925 gr. )
named on front : "ZENIT" stamped in metal on the right front side.
very silencious when shotting.
speeds: 1/2,1/4,1/8 .....1/60, 1/125,1/250,1/500
apertures: 2.8 to 16
no serial number but lense : MC 2.8/28mm - N°900001
Note : ther is a delay timer on back : lever on the left side of finder and depress square button on right side !!!!
the seller said to me , it was engineer Tikomirov 's private prototype (
???)from Alain Berry collection.