Sailing Ship — Hungarian Flag — H.P.S.I.G. — No. 31 B

Description

Illustration of a sailing ship at sea with a mast bearing the Hungarian flag (red, white, green with crowns). Bottom right, the publisher H.P.S.I.G. and the serial number No. 31 B. The reverse indicates the year 198 and the publisher's name 'Universal Postal Union' in several languages.