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.
Letter with 15 cent. Correct rate 20 cent. US
due handstamp indicates deficiency 5 cent and foreign letter rate 20 cent.
In Sweden 5/20 of foreign letter rate 170 öre = 42.5 öre rounded
up to 45 öre and a handling fee of 100 öre, totally 145 öre
have been charged. The amount was normally paid by stamps on the due advice
card but may also have been paid together with other fees.