Brussels local in 1919

This Easter card was sent on 19 April 1919 from a certain lady Rosine to another named Léontine, both in Brussels. Postage of 5c would have sufficed.

Characteristics: 35c+35c single Excessive postage No cancel of arrival Rust spot on front
Estimated value: $30 [Auctioned by delcampe.com in February 2006]