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.
Air mail letter with 10 cent. Correct rate 15
cent (air mail cards were taxed at air mail letter rates). Shortpaid 5
cent. US due handstamp shows double deficiency 2x5x3=30 centimes. Amount
due in Sweden 30x1.7=51 öre rounded up to 55 öre.