Circular, 25 mm, T over 310
Colour: black
310 öre rate period 2.2.1987-5.2.1987 and 1.2.1988-29.1.1989
Most typical use: Foreign letter paid at inland letter rate.
Items known:
..2.88 Stockholm 3 to London (UK), violet
..2.1988 Letter to England. Correct rate 310 öre. Shortpaid 90 öre. Due handstamp indicates deficiency 90 öre and foreign letter rate 310 öre. 90/310 of foreign rate 22 p =~6 p and a handling fee of 25 p; totally 31 p have been charged in England.