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WD 71516 was built for the War Department by Robert Stephenson & Hawthorns in 1944 as Works Number 7170. After wartime service ended, the locomotive was bought by the National Coal Board in 1947, initially to work working at several locations in Northumberland and subsequently . In 1959 it moved to South Wales, working at Cynheidre Colliery and later Graig Merthyr Colliery, near LlanelliPontardulais. From 1976 until 1980 the locomotive was retained at Pontarddulais near Pontardulais as a source of spares, before being saved by the Welsh Industrial & Maritime Museum<ref name=Gwili>[https://gwili-railway.co.uk/enthusiasts/steam-locomotives/ Gwili Railway] (retrieved 28 February 2020)</ref><ref>[https://preservedbritishsteamlocomotives.com/robert-stephenson-hawthorn-works-no-7170-wd-71516-welsh-guardsman/ Preserved British Steam Locomotives website] (Retrieved 19 November 2021)</ref>.