At least eight of these guns were exported to Greece for arming the destroyers of the Vasilevs Georgios class.
Early guns were bored-out versions of the 10.5 cm/55 (4.1") SK C/28. The production guns were constructed of a loose barrel, jacket and breech end piece with a vertical sliding breech block.
Some of these guns were still in service as of 2003 in coastal defense units in Norway.
All German 12.7 cm guns had an actual bore diameter of 12.8 cm (5.04 in).
Hans Lody Z10
Destroyer Friedrich Ihn Z14
12.7 cm/45 SK C/34 guns on unidentified destroyer
Diagram from "German Destroyers of World War Two" by M.J. Whitley
|Designation||12.7 cm/45 (5") SK C/34|
|Ship Class Used On
(see Note 1)
|Destroyers: Z1, Z17 and Z35 classes
(Types 1934, 1936 and 1936B)
Torpedo Boats: T61 class, Leopard and Luchs
Training ship: Bremse as rearmed
U-boats: Type XI
Greece: Vasilevs Georgios class
|Date Of Design||1930|
|Date In Service
(see Note 2)
(see Note 3)
|8,036 lbs. (3,645 kg)|
|Gun Length oa||226.8 in (5.760 m)|
|Bore length||213.8 in (5.430 m)|
|Rifling Length||178.6 in (4.536 m)|
|Grooves||(40) 0.059 in deep x 0.236 in (1.5 mm x 6.0 mm)|
|Lands||0.157 in (4.0 mm)|
|Twist||Increasing RH 1 in 35 to 1 in 30|
|Chamber Volume||744 in3 (12.19 dm3)|
|Rate Of Fire
(see Note 4)
|15 - 18 rounds per minute|
1) This weapon was also planned for the Type 38B and Type 40 destroyers.
2) The Type 24 torpedo boats Leopard and Luchs were used to test the prototypes of these weapons and had their 10.5 cm/55 guns replaced in 1932. Much information was gathered during these evaluations and the improved production version made its service debut in 1934.
3) Converted 10.5 cm (4.1") SKC/28 guns weighed 7,848 lbs. (3,560 kg). Guns designed for the Type XI U-Boats weighed 10,196 lbs. (4,625 kg) due to their increased breech end weights.
4) This weapon was designed for a ROF of 18 - 20 rounds per minute, but the above figure was typical for well-trained crews. As these were open mounts, bad weather or Arctic conditions could greatly reduce the ROF.
5) This weapon was also planned for the Type 1938B Destroyers and the Type 1940 (T61) torpedo boats.
|Weight of Complete Round||N/A|
|Projectile Types and Weights||HE, base fuze - 61.7 lbs. (28.0 kg)
HE, nose fuze - 61.7 lbs. (28.0 kg)
ILLUM - 60.4 lbs. (27.4 kg)
|Bursting Charge||HE, base fuze - about 3.0 lbs. (1.4 kg)
HE, nose fuze - about 4.5 lbs. (2.0 kg) Fp02 (TNT)
|Projectile Length||22.2 in (56.5 cm)|
|Propellant Charge||19.2 lbs. (8.7 kg) RPC/38 (6.4/2.6)
Cartridge - 35.3 lbs. (16 kg)
|Muzzle Velocity||HE - 2,723 fps (830 mps)
ILLUM - 2,133 fps (650 mps)
|Working Pressure||18.7 tons/in2 (2,950 kg/cm2)|
|Approximate Barrel Life||1,950 rounds|
|Ammunition stowage per gun||Z1, Z17 and Z35 classes: 120 rounds
Leopard and Luchs: 100 rounds
T61: 150 rounds
Type XI U-boats: 270 rounds
Grille and Bremse: N/A
Vasilevs Georgios: 192 rounds
1) Outfits for destroyers were nose and base fuzed HE with and without tracer and 80 illumination rounds per ship.
2) Nammo Raufoss produced an anti-ship projectile (ASP M88) starting in 1989. This projectile has the same interior and external ballistics as the earlier German rounds. The projectile weighs 61.7 lbs. (28.0 kg) and has a bursting charge of 7.0 lbs. (3.2 kg).
3) Both nose and base fuzed HE were 8.6crh.
|Elevation||With 61.7 lbs. (28 kg) HE Shell|
|Range @ 30 degrees||19,030 yards (17,400 m)|
Germany: Destroyer Types 1934 (5), 1936 (5), 1936B (5) and 1938B (4), T61 (4), Bremse (4) and Grille (3): MPLC/34
Leopard (3) and Luchs (3): MPLC/28
Greece: Vasilevs Georgios (4): N/A (probably MPLC/34)
|Weight||LC/34: 22,487 lbs. (10,220 kg)
LC/38: 93,035 lbs. (42,200 kg)
|Elevation||LC/34: -10 / +30 degrees
LC/38: -10 / +40 degrees
|Elevation Rate||Hand operated, only|
|Train Rate||Hand operated, only|
1) The twin mount does not appear to have had the guns individually sleeved.
2) The MPLC/28 mountings were converted from 10.5 cm mountings.
14 October 2008 - Benchmark
05 June 2011 - Minor additions
12 February 2014 - Changed burster weights