181. 16" Barbette carriage Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1920] Institution: National Archives at Boston
182. 16" Barbette carriage, boring recoil band Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 29, 1921 Institution: National Archives at Boston
183. 16" Barbette carriage, boring, turning, facing distance ring Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: May 5, 1921 Institution: National Archives at Boston
184. 16" Barbette carriage, cutting teeth in elevating rack Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 29, 1921 Institution: National Archives at Boston
185. 16" Barbette carriage, drilling for traversing roller bearings Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: June 6, 1921 Institution: National Archives at Boston
186. 16" Barbette carriage, machining racer Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1920] Institution: National Archives at Boston
187. 16" Barbette carriage, mounting cradle in side frames Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: May 4, 1921 Institution: National Archives at Boston
188. 16" Barbette carriage, mounting gun in cradle Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: May 5, 1921 Institution: National Archives at Boston
189. 16" Barbette carriage, recoil pull back testing devise Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: April 15, 1921 Institution: National Archives at Boston
190. 16" Barbette carriage, traversing rack drilling fixture Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: May 4, 1921 Institution: National Archives at Boston
191. 16" Barbette mount, close up of generator cylinders in recoil position Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 6, 1938 Institution: National Archives at Boston
192. 16" Barbette mount elevated in recoil position Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 6, 1938 Institution: National Archives at Boston
193. 16" Barbette mount in building 311, showing bombproof shield Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: December 9, 1938 Institution: National Archives at Boston
194. 16" Barbette mount model 191 Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
195. 16" Barbette mount, model 191, side view Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1923 Institution: National Archives at Boston
196. 16" Barr. carr., cradle in RR car, ready for shipment Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: May 19, 1920 Institution: National Archives at Boston
197. 16" Barr. carr., recoil band, cut groove in 20.75 hole Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: June 6, 1921 Institution: National Archives at Boston
198. 16" Barr. carr. recoil band, cutting keyway Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
199. 16" Barr. carr. rough turning recupertor cylinder Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
200. 16" BC Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 4, 1922 Institution: National Archives at Boston