The gun was actually 149.1 mm, but the classification system for artillery rounded up to the next highest centimeter.

The barrel was made of steel with a horizontal sliding breech block and the gun used separate loading ammunition with a cartridge case and bagged charge.

The guns recovered from Tegetthof were assigned to coastal batteries in Libya and Croatia where they were used in World War II.

The barrel, pedestal and semi-circular armored shield from the casemates were reused, but the mounts were modified to increase elevation to +35 ° and traverse to 360°.

[2] Ammunition was of separate loading type with a cartridge case and a bagged charge which weighed 37 kilograms (82 lb).