17 Feb 1985 to 2 Feb 1986
US foreign surface letter rate 37 c (17 Feb 1985-2 Apr 1988)
Swedish standard total fee for incoming due items: 400 öre (3 Dec 1984-2 Feb 1986)
US handstamp shows amount missing in US cents and US surface letter rate.
  In Sweden the indicated fraction was ingnored and instead a standard fee of 400 öre was charged 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.

Surface mail letter with 22 c