Trade Fair to Heverle in 1920

This cover was sent from the Trade Fair (Foire Commeriale) in Brussels to Heverle on 13 April 1920. It arrived the next day.

Characteristics: 5c+5c single and 10c+10c Red Cross of 1915 Franking of 15c (exact amount) Circular 1 cancel (mailman's cancel) Cancel of arrival on back
Estimated value: $75 [auctioned by Olivier Simons in August 2005]