Keywords: 80-G-40885: Building PBM’s at the Glenn L. Martin Plant near Baltimore, Maryland. Highly polished convex plexi-glass domes of machine gun turrets. TR-2609, 1943. U.S. Navy Official U.S. Navy Photograph, now in the collections of the National Archives. (2016/12/20). 80-G-40885: Building PBM’s at the Glenn L. Martin Plant near Baltimore, Maryland. Highly polished convex plexi-glass domes of machine gun turrets. TR-2609, 1943. U.S. Navy Official U.S. Navy Photograph, now in the collections of the National Archives. (2016/12/20). |