It was patented by Archduke Karl Salvator of Austria and Count George von Dormus and was manufactured by Škoda Works Plzeň.
The Salvator-Dormus was chambered in the 8x50mmR round fed from an overhead magazine and was water-cooled with an oil lubrication device.
There was also a pendulum adjustment in the trigger mechanism that allowed the operator to select the cyclic rate of fire, anywhere from 180 to 250 rounds per minute.
Although referred to as a "Maxim" gun, the 1893 could have easily been mistaken for such due to its brass water jacket.
"The World Encyclopedia of Rifles and Machine Guns", JG Press United States.