20 Jan 1950 to 31 Oct 1953
US foreign surface letter rate 5 c
US Conversion rate 1 US cent = 5 goldcentimes (during 1949 the US conversion rate changed to 3 goldcentimes)
Swedish conversion rate 1 goldcentime = 1.7 öre
US handstamp shows amount to pay in goldcentimes, normally double deficiency.
In Sweden the indicated amount was multiplied by 1.7 rounded up to nearest 5 öre and marked on the item. The amount due was normally paid by affixing stamps on the item.
Double rate air mail letter with 15 cent. Correct rate 30 cent. Shortpaid 15 cent. US due handstamp shows double deficiency 2x15x3=90 centimes. Amount due in Sweden 90x1.7=153 öre rounded up to 155 öre. The amount has been paid by affixing postage stamps on the item.