30 May 1978 to 15 Jun 1980
US foreign surface letter rate 20 c
Swedish foreign surface letter rate 170 öre
US handstamp shows amount missing in US cents and US surface letter rate.
In Sweden the indicated fraction multiplied by 170 rounded up to next 5 öre and a handling fee of 100 öre were normally paid by affixing stamps on an advice card sent along with item by the Swedish post office. Items handed out at the window or by rural carriers may have the amount due affixed on the item.

For further details and larger image, click on the item

Letter with 15 cent

Second rate air mail letter with 31 cent