A 9.2-inch Mark X breech-loading gun was mounted on the emplacement in 1902, with improvements made to the battery after World War I.

In 1981 the 9.2-inch gun at Spur Battery was dismantled and transferred to the Imperial War Museum in Duxford, England, for preservation.

Spur Battery is in Gibraltar, the British Overseas Territory at the southern end of the Iberian Peninsula.

This entailed increasing the armour and modernising the control system, and resulted in improvement of loading, elevation, and traverse.

[4] In the 1970s, the Royal Gibraltar Regiment fired the coastal defence gun at Spur Battery for the last time.

[4][7] The 9.2-inch gun fired 29 rounds at a towed target that day, and made its mark several times.

[4] In 1981, the gun at Spur Battery on the Upper Rock Nature Reserve was dismantled and transported to the Imperial War Museum at Duxford, England for preservation.

The first phase was referred to as Project Vitello 1 and entailed the dismantling of the gun at Spur Battery and its transfer to the Gibraltar dockyard.