61. 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
62. 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
63. 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
64. 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
65. 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
66. 16" Barbette mount model 191 Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: [ca. 1908–1926] Institution: National Archives at Boston
67. 16" Barbette mount, model 191, side view Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: 1923 Institution: National Archives at Boston
68. 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
69. 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
70. 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
71. 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
72. 16" BC Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 4, 1922 Institution: National Archives at Boston
73. 16" BC Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 4, 1922 Institution: National Archives at Boston
74. 16" BC Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 4, 1922 Institution: National Archives at Boston
75. 16" BC Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 4, 1922 Institution: National Archives at Boston
76. 16" BC Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: February 4, 1922 Institution: National Archives at Boston
77. 16" BC assembly of cradle and side frames Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: November 8, 1921 Institution: National Archives at Boston
78. 16" BC assembly of side frames to racer Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: November 8, 1921 Institution: National Archives at Boston
79. 16" BC base ring, plaining joints Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: March 16, 1921 Institution: National Archives at Boston
80. 16" BC boring holes for elevating mechanism Creator: Watertown Arsenal (Mass.) Format: Photographs Collection: Watertown Arsenal Photographs Date: March 16, 1921 Institution: National Archives at Boston