1 Feb 1976 to 28 Feb 1977
US foreign surface letter rate 18 c
Swedish foreign surface letter rate 130 öre
US handstamp shows amount missing in US cents and US surface letter rate.
In Sweden the indicated fraction multiplied by 130 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.
Second rate
air mail letter with 31 cent. Correct rate 62 cent. Shotpaid 31 cent. US
due handstamp indicates amount missing 31 cent and foreign surface letter
rate 18 cent. Amount due in Sweden; 31/18 of foreign letter rate 130 öre
= 223.89 öre rounded uo to 225 öre and a handling fee of 100
öre, totally 325 öre. The amont due should be affixed on the
enclosed due card which was to be returned to the post office but may also
have been paid together with other fees.