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Cupola type if shelter
This diagram shows a cupola type of shelter for a permanent gun, featuring counterbalance weight so it can elevate and descend.
7.7 x 4 cm
black and white
- still image
- These materials are either in the public domain, according to U.S. copyright law, or permission has been obtained from rights owners. The digital version and supplementary materials are available for all educational uses worldwide.
- The Janet A. Ginsburg Chicago Tribune Image Collection
- Chicago Sunday Tribune (September 2, 1934), n.p.