[1] Users of this family of gun included the navies of Argentina, Chile, China, Italy, Japan and Spain.

[1] Type 41 guns were employed as Coastal Artillery during World War II after the ships they armed were decommissioned and disarmed.

In order to address the Italian Army's lack of long range heavy artillery surplus 203/45, 254B, 254/40, 305/17, 305/40, and 305/46 Naval Guns were converted to land use.

[4] These guns were mounted on De Stefano carriages for land use and the resulting guns were classified by their size in millimeters 203, their length in calibers 45 and lastly by their carriage type DS which stood for De Stefano or 203/45 DS.

The wheels were fitted with detachable grousers designed by major Crispino Bonagente for traction on soft ground and was towed in one piece by a Pavesi-Tolotti artillery tractor.

The steel rails were mounted on a firing platform made of wooden beams which allowed the gun 360°of traverse.