Rose Heyworth Colliery N.C.B. Lamp Check

Rose Heyworth Colliery N.C.B. Lamp Check.
This is a later lamp check issued by the N.C.B. They were produced for the National Coal Board for use at their collieries, they were embossed with the name of the colliery only, no number was put on them until they were stamped at the pit, this was because the individual collieries had their own manpower numbering system.