141. 240 MM gun shipping crate Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
142. 240 MM gun shipping crate Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
143. 240 MM gun shipping crate Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
144. 240 MM gun shipping crate Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
145. 280 MM Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1950–1959] Institution: National Archives at Boston
146. 280 MM atomic cannon with carrier Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1942–1959] Institution: National Archives at Boston
147. 3" A.A. M1916 M/E Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1918 Institution: National Archives at Boston
148. 3" A.A. M1916 M/E Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1918 Institution: National Archives at Boston
149. 3" Experimental gun on long recoil carriage Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: January 1913 Institution: National Archives at Boston
150. 3" Experimental gun on short recoil carriage Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: January 1913 Institution: National Archives at Boston
151. 3" Field piece model 1902 Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: January 1913 Institution: National Archives at Boston
152. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
153. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
154. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
155. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
156. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
157. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
158. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
159. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston
160. 305 MM RR mount Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1920 Institution: National Archives at Boston