2 Mar 1974 - 30 April 1975
US foreign surface letter rate 18 c
Swedish foreign surface letter rate 100 öre
US handstamp shows amount to pay in US cents (normally double deficiency) and US surface letter rate.
In Sweden indicated fraction multiplied by 100 rounded up to nearest 5 öre was normally paid by affixing stamps on the item.
Air mail postcard
with 13 cent. Correct Rate 18 c. Due handstamp indicates double deficiency
10 c and foreign surface letter rate 18 c. Swedish due label indicates
10/18 of foreign surface letter rate 100 = 55.56 öre rounded up to
60 öre. 60 öre postage stamp affixed to pay the due.