Unframed 14x10 mm
Colour: violet
170 öre rate period 1.2.1978-15.6.1980
Most typical use: Air mail letter to North Amerika 15-20 grams paid at surface rate.
Items known:
12.7.1978 Linköping to London (UK), violet
12.7.1978. Letter to England. Correct rate 170 öre. Shortpaid 100 öre. Due handstamp indicates deficiency 100 öre and foreign letter rate 170 öre. 100/170 of foreign rate 10.5 p =6.17 p ~6 p and handling fee 15 p, totally 21 p have been charged in England.