Birch Gun Self Propelled Artillery

The Birch Gun is a British self propelled artillery piece that has multiple variants. The tank was not serviced not because of performance but for other more political reasons. The tank was built on the chassis of the Vickers Medium Mk. II. Seven in total were built. The Birch Gun Mk. IE had the installation of an enclosed cabin.

1.
Name: Birch Gun Mk. I
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: 1

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-84 mm 18-Pounder
Secondary Armament:

Gun Flexibility: -? to 70

Armor:
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield

2.
Name: Birch Gun Mk. IA
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: ?

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-75 mm Gun OR
-84 mm 18-Pounder
Secondary Armament:
-6 mm Cannon
Gun Flexibility: -? to 70

Armor: (Armor added but no source for where)
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield

3.
Name: Birch Gun Mk. IB
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: ?

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-75 mm Gun OR
-84 mm 18-Pounder
Secondary Armament:
-6 mm Cannon
Gun Flexibility: -? to 70

Armor: (Armor added but no source for where)
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield

4.

Name: Birch Gun Mk. IC
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: ?

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-75 mm Gun OR
-84 mm 18-Pounder
Secondary Armament:
-6 mm Cannon
Gun Flexibility: -? to 70

Armor: (Armor added but no source for where)
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield

5.

Name: Birch Gun Mk. ID
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: ?

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-75 mm Gun OR
-84 mm 18-Pounder
Secondary Armament:
-6 mm Cannon
Gun Flexibility: -? to 70

Armor: (Armor added but no source for where)
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield

6.
Name: Birch Gun Mk. IE
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: 1

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-84 mm 18-Pounder

Secondary Armament:

Gun Flexibility: -? to 70

Armor:
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield?

7.
Name: Birch Gun Mk. IF
Type: Self Propelled Artillery
Origin: United Kingdom
Year: 1925
Produced: ?

Length: 5.8 Meters
Width: 2.4 Meters
Height: 2.3 Meters
Weight: 12100 Kilograms
Speed: 45 km/h

Crew: 6

Primary Armament:
-75 mm Gun OR
-84 mm 18-Pounder
Secondary Armament:
-6 mm Cannon
Gun Flexibility: -? to 70

Armor: (Armor added but no source for where)
-Hull
12 mm Front
8 mm Side
8 mm Rear
4 mm Top
4 mm Bottom
-Upper Structure
-6 mm Gun Shield?

Sources:
http://civilianmilitaryintelligencegroup.com/20447/the-birch-gun
https://www.onwar.com/weapons/afv/data/Birch-gun.htm
http://www.aviarmor.net/tww2/tanks/gb/spg_birch_gun.htm