Swiss Postage Stamps: For the War Board of Trade

1918. Definitive issues overprinted INDUSTRIELLE KRIEGS-WIRTSCHAFT in letterpress in black color.

TYPES OF OVERPRINTS
I Switzerland War Board of Trade stamp overprint types Type I: thin overprint.

Type II: thick overprint.

 

Bibliography

  1. Michel Schweiz/Liechtenstein-Spezial 2003/2004, Schwaneberger Verlag, GMBH, München. ISBN 3-87858-365-6