9th/12th Lancers Armoured Car Crewman Badge

The 9th/12th Royal Lancers (Prince of Wales's) was a cavalry regiment of the British Army, formed in 1960 by the amalgamation of the 9th Queen's Royal Lancers and the 12th Royal Lancers. In the later years of its existence, the regiment served as a formation reconnaissance regiment, equipped with the Combat Vehicle Reconnaissance (Tracked) family of vehicles and was attached to the 7th Armoured Brigade, the Desert Rats. The regiment was based in South Wigston, Leicestershire, along with its affiliated Territorial Army unit, B (Leicestershire and Derbyshire Yeomanry) Squadron, The Royal Yeomanry. It was amalgamated with the Queen's Royal Lancers on 2 May 2015 to form the Royal Lancers.

(https://en.wikipedia.org/wiki/9th/12th_Royal_Lancers)