10.66mm ten barrels Nobel machine gun
| Bulgarian designation : | десетцевни 10,66 мм картечница
  “Нобел” | |
| Russian designation : | 10-ствольная
  4,2-линейная
  скорострельная
  пушка обр.
  1871 г. | |
| Calibre : |  | |
| Weight of the barrel : |  | |
| Weight of the carriage : | 276.5 kg
  (light carriage) | |
| Weight in marching order : |  | |
| Gun length : |  | |
| Barrel length :  |  | |
| Barrel grooves | number : | 6 | 
| depth : |  | |
| width : |  | |
| Cartridge | weight : |  | 
| length  : |  | |
| metal : | brass | |
| Bullet | weight : |  | 
| length  : |  | |
| charge : |  | |
| metal : | hardened
  lead  | |
| Muzzle velocity : | 430 m/s | |
| Max. range : |  | |
| Elevation : | + 60° / +
  50° (with light carriage) | |
| Traversing angle : | 60° | |
| Wheels height :  |  | |
| Rate of fire : | 250/300
  rounds per minute | |
| Alimentation : | aluminium
  box with 24 rounds (mod. 1871) four boxes
  with 25 rounds each (mod. 1874) | |
| Ammunition : | 6048
  rounds (with 4 pdr carriage) 6720
  rounds (with light carriage) | |
| Transport : | drawn by
  four horses | |
| Crew : | 7 men | |
| Remarks : Mechanical
  machine gun (mitrailleur) introduced in the Russian
  Army in 1871 and manufactured by the firm Ludwig Nobel of Sankt Petersburg.
  It was based on a 12.7mm six barrels Gatlin machine gun bought in 1862, and
  on a 10.7mm ten barrels machine gun designed by col. Aleksandr
  Pavlovich Gorlov, a
  member of the Russian Artillery Committee. In the machine guns delivered to
  the Bulgarian Army the barrels were mounted on the carriage of the 4 pdr field gun with an improved iron frame. They fired the
  same ammunition as the Berdan 2 rifle. At the beginning of the Russo-Turkish
  War 16 ten and six barrels machine guns were delivered to the Bulgarian
  National Army. At the beginning of the Balkan War 8 ten barrels machine guns
  were still in service. | ||
|  | 
| Pictures
  from Pleven, Byala, Shipka
   Thanks to Biser Bonchevski |