Mechelen to Prague in 1920

This cover was sent from Mechelen on 21 May 1920 to Prague (Checkoslovakia).

Characteristics: 1c+1c and 2c+2c, with 15c, 20c and 35c definitives of 1915, for a total franking of 73c Registered cover Foreign destination No cancel of arrival Extra numbers stamped on each side (62641 and 62644)
Estimated value: $50 [Purchase price in November 2004]