Vintage y.e.b electricity grid, Enamel Post Sign "Blyton - Foxby lane" 

 blyton - foxby lane  are 

substations on the old y.e.b electricity grid, these signs were fixed on the 33kv overhead lines in the substation with a danger flag on them,when the linesmen where working on these lines back in the 70s,

the sign has never been fitted , new old stock , great collector piece measurements are 9" x 5.5"