From Diplomatic Conference in Spa to Verviers in 1920

This cover was cancelled on 15 July 1920 at the site of the Diplomatic Conference which was taking place in Spa. It is doubtful that this cover of philatelic nature and addressed to self ever circulated.

Characteristics: 1c+1c in nice corner block of 15 with marginal inscriptions Excessive franking, philatelic cover Clear cancels No cancel of arrival
Estimated value: $140 [Auctioned on delcampe.com in May 2007]