Circular 26.5 mm
Colour: violet
170 öre rate period 1.2.1978-15.6.1980
Most typical use: Air mail letter 5-10 grams to North America paid at surface letter rate
Items known:
12.3.1880 Göteborg 1 to Brooklyn, NY (US), violet
11.9.1979 Air mail letter 5-10 grams to USA. Surface fee 170 öre. Air mail fee 25 öre per 5 grams. total fee 220 öre. Shortpaid 50 öre. Due handstamp indicates
deficiency 50 öre and foreign letter rate 170 öre. The amount due has not been properly calculated in USA. Normally the office of exchange marked the amount to pay, which should have been 26 cent, but hare a 8 c stamp has been affixed probably of philatelic reasons.