221. Two men operating machinery Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1964] Institution: National Archives at Boston
222. Two views of cradles mounted in holding fixture showing trunion to be plated at top center of cradle Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1963–1967] Institution: National Archives at Boston
223. Two views of cradles mounted in holding fixture showing trunion to be plated at top center of cradle Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1963–1967] Institution: National Archives at Boston
224. Typical instrumented test model 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
225. Unidentified wood chests amd all metal staff, in 96" sections Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 27, 1944 Institution: National Archives at Boston
226. United States Testing Machine designed by A.H. Emery, 1875 Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1977] Institution: National Archives at Boston
227. Vacuum furnace utilized to heat treat uranium alloy test specimens Creator: U.S. Army Materials and Mechanics Research Center. Public Affairs Office; Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1963–1967] Institution: National Archives at Boston
228. Victor 200 KVA x-ray machine to be transferred to Harvard Smithsonian Institute Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [March 5, 1962] Institution: National Archives at Boston
229. Victor 200 KVA x-ray machine to be transferred to Harvard Smithsonian Institute Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: March 5, 1962 Institution: National Archives at Boston
230. Woman operating shaper Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1918 Institution: National Archives at Boston
231. Woman working at machine Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1942–1959] Institution: National Archives at Boston
232. Women operators, bench work Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1918 Institution: National Archives at Boston
233. Women operators in projectile machine shop Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1918 Institution: National Archives at Boston
234. Working model of MacIntosh-Seymour Marine Steam Engine made by Watertown Arsenal Apprentice School Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: September 4, 1946 Institution: National Archives at Boston
235. Working model of MacIntosh-Seymour Marine Steam Engine made by Watertown Arsenal Apprentice School Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [1946] Institution: National Archives at Boston
236. Working model of MacIntosh-Seymour Marine Steam Engine made by Watertown Arsenal Apprentice School Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [1946] Institution: National Archives at Boston
237. X-ray in bldg. 45 Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1939–1959] Institution: National Archives at Boston
238. The 100,000th centrifugally cast gun tube Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 20, 1944 Institution: National Archives at Boston
239. The 100,000th centrifugally cast gun tube Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 20, 1944 Institution: National Archives at Boston
240. 5th Advanced Training Course Group Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: January 1942 Institution: National Archives at Boston
