4 RM Polar travel 1931, on appropriate Zeppelin cover (Sieger-no. 119 F) from "FRIEDRICHSHAFEN (Lake Constance) b 24.7.31" to ice-breaker "Malygin" and then further to brooklyn / USA. Reverse violet stamp "FIRST INTOURIST 1931 expedition ICE-BREAKER MALYGIN". An attractive and very fine document, Michel 1.100.- ++