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21. 16" BC distance ring, drilling & taping for roller bearings

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1908–1926]
Institution:: National Archives at Boston

22. 16" BC section of base ring

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1908–1926]
Institution:: National Archives at Boston

23. 16" DC carriage in pit

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1908–1926]
Institution:: National Archives at Boston

24. 16" DC model 1917

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1917]
Institution:: National Archives at Boston

25. 16" Howitzer locking hoop being quenched, weight 32,500

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1908–1926]
Institution:: National Archives at Boston

26. 240 MM shell, finish turning base in preparation for base cover

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: April 1945
Institution:: National Archives at Boston

27. 240 MM shell, finish turning bourrelet

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: July 30, 1945
Institution:: National Archives at Boston

28. 240 MM shell, showing method of setting tool by indicator for finish turning bourrelet

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: July 30, 1945
Institution:: National Archives at Boston

29. 240 MM shell, transfer of rotating band from induction furnace to banding press

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: April 1945
Institution:: National Archives at Boston

30. 2400 Ft-Lb Charpy machine, bldg 71

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1959–1962]
Institution:: National Archives at Boston

31. 2400 Ft-Lb Charpy Machine, bldg 71

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1959–1962]
Institution:: National Archives at Boston

32. 2,400,000 lb hydraulic tension-compression testing machine

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1959–1962]
Institution:: National Archives at Boston

33. 2,400,000 lbs. capacity tension-compression testing machine

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1964]
Institution:: National Archives at Boston

34. 2,400,000-lb hydraulic tension-compression testing machine

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1959–1962]
Institution:: National Archives at Boston

35. 3" AA assembly line, building 36

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: May 14, 1937
Institution:: National Archives at Boston

36. 3" AA fuse setter M-5

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: September 15, 1936
Institution:: National Archives at Boston

37. 305 MM sliding railway mounts 3 and 4

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1908–1926]
Institution:: National Archives at Boston

38. 34 year old floor mill machining 3" AA bogie

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: December 22, 1938
Institution:: National Archives at Boston

39. 4-spindle hydrotel vertical automatic hydaulic operated machine for milling, regular contours

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: [ca. 1942–1959]
Institution:: National Archives at Boston

40. 500 lb vacuum furnace

Creator:: Watertown Arsenal (Mass.)
Format:: Photographs
Collection:: Watertown Arsenal Photographs
Date:: April 8, 1960
Institution:: National Archives at Boston