The Pattern 1913 was the Russian produced version of this weapon. The Mark A and Mark B versions were produced for Russia by the British firm of Vickers. The Mark A was manufactured prior to World War I while the Mark B was manufactured during World War II.

This weapon was originally designed as a cartridge gun, but the Russian Navy wanted a cheaper and simpler design, so Obukhov modified the weapon to use bag ammunition with a Welin breech-block. In 1913 the Obukhov factory received an order for 471 of these guns. By 1917, 147 guns had been manufactured with the balance to be delivered in 1917-18. However, due to the Russian Revolution, these remaining weapons were never completed. In addition to the guns built by Obukhov, a further 100 guns were ordered from Vickers in 1913 with most of them being delivered by 1917. The Royal Navy considered this weapon for arming DAMS during World War I, but decided against it as it would have added yet another medium-caliber weapon to the inventory.

The Russians used these guns to rearm some of the older protected cruisers, as secondary armament on Imperatrisa Maria class battleships and as main armament for the new Svetlana class light cruisers. By 1917 the Naval Ministry had 117 guns on hand plus some additional guns used for coastal defense under army command. During the Russian Civil War these guns armed many river gunboats and barges.

Redesigns during the 1920s and 1930s attempted to increase elevation, but these were not particularly successful and none were adopted for general service use. However, in 1930 two mounts with +40 degree elevation were built for river monitor Udarny. As of 1941, the Soviet Navy had over a hundred of these guns in service, with 21 in the Baltic Fleet, 7 in the Pacific Fleet, 64 in the Black Sea Fleet, 6 in the North Sea Fleet and 12 in the Amur Flotilla.

Vickers delivered 55 guns and 55 spare barrels for the Mark B during the latter half of World War II. In addition, the USA supplied shrapnel rounds for these weapons during World War II.

Eighteen of these guns formerly on the Russian battleship Imperator Alexandr III came under German control when they captured the steamship Nina in 1940 at Bergen, Norway. They were then used in Norwegian coastal defense batteries.

The Mark A consisted of A tube, three B tubes to the muzzle, jacket and a small breech ring. The breech bush holding the Welin breech block was screwed into the jacket. The Pattern 1913 was to a similar design. Mark B had a loose barrel, jacket and breech ring with breech bush and gun ring.

• ^The propellant was in a single bag.

Elevations above 30 degrees would only be applicable to coastal artillery mounts.

"Naval Weapons of World War Two" by John Campbell
"Sovetskie Boevye Korabli 1941-45: IV Vooruzhnie" (Soviet Warships 1941-45: Volume IV Armament) by A.V. Platonov
"Morskaya Artilleriya Rossiyskogo Flota 1867-1922" (Naval Artillery of the Russian Fleet 1867-1922) and "Entsiklopedia Otechestvennoi Artillerii" (Encyclopedia of Fatherland [Russian] Artillery) both by A.V. Shirokorad
"Destroyers of World War Two" and "Cruisers of World War Two" both by M.J. Whitley
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Special help from Vladimir Yakubov

10 May 2006 - Benchmark
17 October 2012 - Updated to latest template
07 May 2019 - Converted to HTML 5 format, corrected typographical error
30 December 2022 - Added comment about guns captured by the Germans