On March 14, 1953 the DDR issued a set of 10 stamps commemorating the 70th anniversary of the death of Karl Marx. The stamps were printed by photogravure in sheets of 50. There are two watermark types of these stamps.
One of these stamps, the 24 pf (Michel #349) exists in two varieties, with the "DEMOKRATISCHE REPUBLIK" inscription being 22.2mm in length in the first type, and 21.5mm in length in the second type. Examination under 10x shows that these are from two differently prepared plates. The "cells" of the type II stamps are much more precise.