Busy soldier's correspondence card, A machine gun nest, by Tichnor Brothers, c. 1930-1945, from the Digital Commonwealth - 1 commonwealth x346gb77g.
Tichnor Brothers
Digital Commonwealth (<a rel="nofollow" class="external free" href="https://www.digitalcommonwealth.org/search/commonwealth:x346gb77g">https://www.digitalcommonwealth.org/search/commonwealth:x346gb77g</a>)