PSV Bus Driver Eastern Traffic Area licensing badge

A very good formica PSV Eastern Traffic Area Bus Driver's badge, license number "FF 13534" held in a brass holder with lapel buttonhole fitting to the reverse. Very good condition, colours remain bright and complete with its original leather outer case, this with some age wear around the suspension.
Diameter 50mm.
Eastern Traffic Area based at Sussex House, Hobson Street, Cambridge, covered the Counties Cambridgeshire, Isle of Ely, Norfolk, Suffolk and parts of Bedfordshire, Essex, Huntingdon and Peterborough.