 Whether many of either model were made before war orders halted production in 1915 is unclear.Other manufacturers known to use Villiers engines up to 1915 include the Campion, The Hobart, the Chater-Lea, the Diamond, and the Excelsior.During World War One, in common with many firms not directly involved in making military transport, the Villiers factory changed to production of munitions, in particular fuses for 75mm shells.