McVitie Weston valve collection, Brimar valve, type 6B8
Brimar valve, type 6B8, (RMW/Y355 - McVitie Weston number), by Standard Telephones and Cables Limited.
Brimar valve, type 6B8, (RMW/Y355 - McVitie Weston number), by Standard Telephones and Cables Limited.