Polish Vertebrates Evolution Series

Poland · 1966 · 20gr, 30gr, 40gr, 60gr, 90gr, 1.15zł, 1.35zł, 1.55zł, 2.50zł

This set of nine stamps illustrates the evolutionary development of vertebrates, featuring various animals from aquatic life forms to land mammals. Each stamp showcases a distinct species representing a stage in this biological progression.

Issued in 1966 by the Polish Post, this series reflects a common theme in mid-20th century philately, particularly in Eastern Bloc countries, of promoting scientific and educational topics like evolution.