421. Bicent. USA Open House Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office Format: Photographs Collection: Watertown Arsenal Photographs Date: June 14, 1975 Institution: National Archives at Boston
422. Bins of metal Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1939–1959] Institution: National Archives at Boston
423. Bldg. 131 headquarters, main office and hospital, looking northwest Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: October 1939 Institution: National Archives at Boston
424. Bldg. 141 guard and firehouse, new north gate showing electric barrier and control Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 1939 Institution: National Archives at Boston
425. Bldg. 141 guard and firehouse new northgate showing electric barrier and control Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 1939 Institution: National Archives at Boston
426. Bldg. 221, oil storage looking southeast, foundry, bldg. 41 in background Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1939–1959] Institution: National Archives at Boston
427. Bldg 311 construction, looking south east from Arsenal St showing old mattress bldg Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: January 2, 1942 Institution: National Archives at Boston
428. Bldg. 313N apprentice school at night, looking east Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 5, 1939 Institution: National Archives at Boston
429. Bldg. 32 storage, surplus machinery and supplies Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: October 1939 Institution: National Archives at Boston
430. Bldg. 35 machine shop looking west Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: November 1939 Institution: National Archives at Boston
431. Bldg. 36 Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1967–1984] Institution: National Archives at Boston
432. Bldg. 36 Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1967–1984] Institution: National Archives at Boston
433. Bldg. 36 Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1967–1984] Institution: National Archives at Boston
434. Bldg. 39 WAL Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1942–1959] Institution: National Archives at Boston
435. Bldg 41 construction looking north east Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 30, 1941 Institution: National Archives at Boston
436. Bldg 41 construction looking north west into excavation Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 17, 1942 Institution: National Archives at Boston
437. Bldg 41 construction looking north west into excavation Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: March 3, 1942 Institution: National Archives at Boston
438. Bldg 41 construction looking north west into excavation for furnace equipment Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: March 18, 1942 Institution: National Archives at Boston
439. Bldg 41 construction looking south west into pit for heat treating equipment Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: March 24, 1942 Institution: National Archives at Boston
440. Bldg 41 construction looking west Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 10, 1942 Institution: National Archives at Boston