| 120 mm 50 caliber Pattern 1905 | |
|---|---|
 An open twin-mount Pattern 1905 in Finnish service. | |
| Type | Naval gun Coastal artillery Railway artillery |
| Place of origin | Great Britain |
| Service history | |
| In service | 1905–1950s |
| Used by | Russian Empire Soviet Union Finland |
| Wars | World War I Russian Civil War Winter War World War II |
| Production history | |
| Designer | Vickers |
| Designed | 1905 |
| Manufacturer | Vickers Obukhov State Plant |
| Produced | 1905 |
| No. built | 210 |
| Specifications | |
| Mass | 3.1 t (3.4 short tons) |
| Length | 6 m (19 ft 8 in) 50 caliber |
| Barrel length | 5.8 m (19 ft 0 in) |
| Shell | Fixed QF ammunition |
| Shell weight | 20.4–29 kg (45–64 lb) |
| Calibre | 120 mm (4.7 in) |
| Elevation | Single mount: -10° to +20° Twin mount: -3° to +27°[1] |
| Traverse | 360° |
| Rate of fire | 6-7 rpm |
| Muzzle velocity | 792 m/s (2,600 ft/s) |
| Maximum firing range | 13.7 km (8.5 mi) at +20°[2] |
The 120 mm 50 caliber Pattern 1905 was a Russian naval gun developed by Vickers for export in the years before World War I that armed a variety of warships of the Imperial Russian Navy. Guns salvaged from scrapped ships found a second life as coastal artillery, railway artillery and aboard river monitors during the Russian Civil War.[2] It was estimated that there were 110 guns in the Soviet Navy's inventory in 1941. Of these, 39 were in the Baltic Fleet, 20 in the Black sea Fleet, 24 in the Amur Flotilla, 11 in the Pacific Fleet and 6 in the Pinsk flotilla in World War II.[1]