WW2 Auxiliary Fire Service AFS bluette overall set of AFS buttons

A scarce original Second World War pre 1941 period set of eight 'Auxiliary Fire Service AFS bluette overall nickel buttons'; three large examples all with maker's details 'FIRMIN LONDON' and one large 'Ed GILL BIRMINGHAM, four small all with maker's details two 'J.R.GAUNT & SON LTD LONDON' (one dented at fault) two 'BUTTON LTD B'HAM' Good condition, complete with original shanks, the large with brass backing plates.Diameter approx 24mm. and 16mm.