I will definitely nòt be "guessing the light" in Siberia with this beautiful aluminum фотоэкспонометр.
Early sixties (or late fifties?) and at Цена 1 руб. 35 коп. (About 4 rolls of film, the Ленинград-2 was 6 руб. but that was in the eighties.)
Easy to handle with gloves, too.