Circular, 24 mm
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 foreign postcard rate.
Items known:
24.4.1988 Linköping 1 to Lissabon (PT), black
19.12.1988 to Banafrer, Ireland, black
19.12.1988 Letter to Ireland paid at postcard rate. Correct rate 310 öre. Shortpaid 60 öre. Due handstamp indicates deficiency 60 öre and foreign letter rate 310 öre. 60/310 x foreign rate 37 p + handling fee 17 p = 24.16 p rounded to 24 p charged in Ireland (Rate calculation made by Michael Furfie)