Note that the ad does not say: "made for HM King George V, etc." It merely states "as supplied to.." IMHO this is no provenance at all! I can say as well that I own "an old model Gibbs Mannlicher as used by W.D.M.Bell" or "a Mannlicher Schoenauer as used by Hermann Goering.."
-------------------- German foresters: We like sustainability! For merely 300 years by 2013.