1937 Estonia printed matter abroad 5s, cancelled postage due, Orissaare – Anvers, Belgium

Postcard rate abroad was 15s, but printed matter up to 50gr was 5s. This card was valid for printed matter rate (up to six words), postal clerk initially applied postage due, which was later cancelled. Interesting and valid single 5s president Päts stamp. Posted from island Saaremaa, on the picture side is Kuressaare fortress.