International registered air mail letter to North America (category IIIa and later 3a) < 5 gr.
Postage rate 40 öre, registered mail fee 50 öre and air mail fee 25 öre
Registered mail label type 7:2 and a printed mail label
Arrival postmark: New York MAY 16 1959
01/06/57 - 30/06/62