WW1 National Reserve London white metal uniform button J.R.Gaunt

A rare original First World War period 'National Reserve London white metal full size uniform button' bearing embossed title surround with Crown to the centre; the reverse impressed with maker's details 'J.R.GAUNT & SON LTD LONDON'. Good used condition, complete with shank.Diameter approx 23mm.Class II reservists who did not wish to transfer out of the National Reserve but who nevertheless offered their services were uniformed, armed and attached to Territorial Force units to guard vulnerable points.