| No.
|
Caliber
|
Length
|
Model
|
Serial No.
|
Manufacturer
|
Carriage
|
Service Dates
|
Notes
|
| A-1
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
51
|
Builders
|
Mortar 1896MI, 259, Barig. Engr. Co.
|
1901-1942
|
|
| A-2
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
?
|
?
|
Mortar 1896MI, ?, Barig. Engr. Co.
|
1901-1918
|
Removed 1918
|
| A-3
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
54
|
Watervliet
|
Mortar 1896MI, 256, Barig. Engr. Co.
|
1901-1942
|
Changed to A-2
|
| A-4
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
?
|
?
|
Mortar 1896MI, ?, Barig. Engr. Co.
|
1901-1918
|
Removed 1918
|
| B-1
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
49
|
Builders
|
Mortar 1896MI, 255, Barig. Engr. Co.
|
1901-1942
|
|
| B-2
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
?
|
?
|
Mortar 1896MI, ?, Barig. Engr. Co.
|
1901-1918
|
Removed 1918
|
| B-3
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
21
|
Niles Tool Works
|
Mortar 1896MI, 252, Barig. Engr. Co.
|
1901-1942
|
Changed to B-2
|
| B-4
|
12" Mortar Rifle
|
141.125"
|
M1890MI
|
|
?
|
?
|
Mortar 1896MI, ?, Barig. Engr. Co.
|
1901-1918
|
Removed 1918
|
| Source: RCW Form 1, Sep 1927
|