General Post Office GPO Telephone Lineman officially numbered badge

A very rare original post 1902 period 'General Post Office Lineman Engineer on official duty badge'; large heavy brass medallion with substantial loop, the obverse bearing the 'Royal Arms', the reverve incised 'G.P.O No 1052 LINEMAN'. Good condition, general service wear.
Diameter approx 43mm.
Height 52mm.

Code: 65122