1 Feb 1978 - 29 May 1978
US foreign surface letter rate 18 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.
Second rate air mail letter with 31 cent. Correct rate 62 cent. Shortpaid 31 cent. US due handstamp shows deficiency 31 cent and surface letter rate 18 cent. In Sweden 31/18 multiplied by foreign letter rate 170 = 292.78 öre rounded up to 295 öre and handling fee 100 öre, totally 395 öre have been charged. The amount due should be affixed on the enclosed due advice card which was returned to the post office.