The fed is a copy of the German Leica II.
Fed stands for "Felix Dzerzhinsky".
It has a focal-selesai shutter from rubberized cloth blinds from excerpts: "B" (or "Z"), 1/20, 1/30, 1/40, 1/60, 1/100, 1/200, 1/500 sec.
Has singlestate and self-timer.
Complete lens "fed" 3,5/50 with the following values of the diaphragm: 3,5, 4,5, 6,3, 9, 12,5, 18.
Thread 39х1.