Circular, 27 mm
Colour: violet
140 öre rate period 1.3.1977-31.1.1978
Most typical use: Air mail letters 5-10 grams to parts of Africa and Asia paid at surface letter rate.
Items known:
24.7.1977 Lerum to Döbriach (AT), violet
24.7.1977. Letter to Austria. Correct rate 140 öre. Shortpaid 80 öre. Due handstamp indicates deficiency 80 öre and foreign letter rate 140 öre. 390 Groschen have been charged in Austria.