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Siemens' polarised relay, 1869

1869

Polarised relay 10000/10000

Polarised relay used on 4-button selective omnibus circuits

Polarised relay used on D.C. selective ringing telephone omnibus circuit

Creed polarised relay, 7129 2

Telegraph instrument

Polarised relay 3000 type for exchange ringing on two button D.C. omnibus circuits

Polarised relay 10000/10000

Polarised relay used on D.C. selective ringing telephone omnibus circuit

Polarised relay used on 4-button selective omnibus circuits

Polarised relay 5000/5000 used on railway selective circuits

P.O. polarised relay

Polarised relay, Siemens Bros. & Co. Ltd., No. 14625

Polarised relay used on 2-button D.C. omnibus circuit

Two polarized relays

Two polarized relays

Two polarized relays, unknown manufacture

Two polarised relays, early Creed type

Two polarized relays

Two polarised relays 4500/4500 used on 4-button selective omnibus circuits

Two polarized relays, unknown manufacture

Two polarised relays, early Creed type

Two polarized relays, unknown manufacture

Two polarised relays used on D.C. selective ringing telephone omnibus circuit

Two polarised relays 10000/10000

Two polarised relays, early Creed type