The name of Wrocławskie Towarzystwo Fotograficzne (WTF) was used until 1948. From 17th of December of the year, WTF became a branch of the centralized Polish Photographic Society.
The illustration presents cover of a letter of 12 December 1949, with a gum stamp used by the newly named society.
The name was changed in 1961 to Dolnośląskie Towarzystwo Fotograficzne {Photographic Society of Lower Silesia).