ca April 1888 to 31 Dec 1891
US foreign surface letter rate 5 c
US Conversion rate 1 US cent = 5 goldcentimes
Swedish conversion rate 1 goldcentime = 0.80 öre for letters, 1 goldcentime=1 öre for postcards and printed matters
US marking shows the amount missing in goldcentimes.
In Sweden the indicated amount was doubled and multiplied by 0.80 for letters and 1 for postcards and printed matters. The amount due was paid by affixing postage due stamps.
Fifth rate letter with 10 cent. Correct rate 25 cent. Shortpaid 15 cent. US due markings indicate number of rates and amount missing; 15x5=75 centimes. In Sweden the amount have been doubled and multiplied by 0.8 (2x75x0.8) and 120 has been indicated in blue manuscript. 120 öre in postage due stamps have been affixed on back.