| No.
|
Caliber
|
Length
|
Model
|
Serial No.
|
Manufacturer
|
Carriage
|
Service Dates
|
Notes
|
| A-1
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
48b
|
Bethlehem Iron Co.
|
Mortar, M1896MI, #141, Am. Hoist & D. Co.
|
1902-1942
|
|
| A-2
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
55d
|
Bethlehem Iron Co.
|
Mortar, M1896MI, #139, Am. Hoist & D. Co.
|
1902-1942
|
|
| A-3
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
48a
|
Builders Iron Fdry.
|
Mortar, M1896MI, #140, Am. Hoist & D. Co.
|
1902-1942
|
|
| A-4
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
47
|
Builders Iron Fdry.
|
Mortar, M1896MI, #137, Am. Hoist & D. Co.
|
1902-1942
|
|
| B-1
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
45
|
Builders Iron Fdry.
|
Mortar, M1896MI, #293, Rarig Engr. Co.
|
1902-1942
|
|
| B-2
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
54
|
Bethlehem Iron Co.
|
Mortar, M1896MI, #126, Am. Hoist & D. Co.
|
1902-1942
|
|
| B-3
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
55c
|
Watervliet
|
Mortar, M1896MI, #112, Providence Steam Engine Co.
|
1902-1942
|
|
| B-4
|
12" Mortar Rifle
|
141.12"
|
1890MI
|
|
14
|
Niles Tool Works
|
Mortar, M1896MI, #127, Am. Hoist & D. Co.
|
1902-1942
|
|
| Source: Coastal Defense Study Group
|