The post-war Brno ZG-47 is essentially a commercial version of the G33/40 and was made in the same factory from 1947 onwards. Major differences included bolt handle, longer magazine, trigger options, and commercial finish. Later Brno Mausers like the 22H built on the same action had a flat top receiver rings with a dovetail scope mounting system, and a more refined safety and bolt shroud, but the earlier ZG-47 had a round top with clip slots if I recall correctly.

By the way, the G33/40 was little more than a modified version of the Czech VZ33 introduced in 1933 (as indicated by the name), with slightly different furniture and German markings after the occupation of Czechoslovakia by the Third Reich in early 1939. They were all a standard Model 1898 length, with small front receiver ring, small barrel shank, and extensive lightening cuts on the receiver and hollow bolt handle.