/added 19 June 2015
T 25c
Rectangular 16.5x20 mm, "T" 2.0 mm from upper frame, "c" more open and 3.6 mm from lower frame
Colour: black
Items known:
29.6.1939 Stockholm 1 to Potsdam (DE), black

29.6.1939. Single rate letter to Germany. Correct rate 30 öre. Shortpaid 15 öre. Amount due 2x15/1.20=25 centimes. Converted to 25 German pfennige