Mercury switch
circa 1950
Relay switch made by the Power Equipment Co. Ltd
circa 1950
Mercury switch made by the Power Equipment Co. Ltd
circa 1950
Ferranti stall recovery switching unit
Switching unit
Ferranti switching unit
Mercury tube switch
Mercury tube No. 9 for switch
Mercury tube No. 9 for switch
Mazda 80W glass starter switch
1950-1960