Police Helmet Plates(x3) & papers

auction is for three police helmet plates - Derbyshire, Lincolnshire & West Yorkshire forces. All very good condition with fixing screws & lugs intact.

also two queens crown police buttons and a West Riding of Yorkshire Constabulary certificate awarded to Special Constable Arthur Thorpe from South Elmsall for completing anti-gas training during WW2 - dated December 1939 and signed by the Chief Constable