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 inland letter rate.
Items known:
19.5.1988 Göteborg to Aarau (CH), black
16.10.1988 Göteborg Postterminal to San Francisco CA (US), black
5.12.1988 Göteborg to London (UK), black
16.10.1988 Letter to USA. Correct rate 310 öre. Shortpaid 90 öre. Due handstamp indicates deficiency 90 öre and foreign letter rate 310 öre. 90/310 of foreign rate 40 c =~12 c and a handling fee of 42 c; totally 54 c have been charged in USA.