Strowger automatic telephone, 1901-1910

1901-1910

Lissen Headphones, 1922-1930

1921-1930

Astatic Current Indicator (No 615) marked 'Crompton's patent' maded by R E Crompton & Co

circa 1878-1927

Cable-code Telegraph Key

Model Disc Discharger, Marconi Company Souvenir, 1912

1912

Railway chair wedge of laminated phenolic resinoid bonded sheet

Blank from which gear wheels are cut

Bell type insulator

Strain insulator

Machine castor with wheel cut from laminated phenolic resinoid bonded sheet

Three rods and three tubes of laminated phenolic

Metal rods with covering of phenolic resinoid bonded paper