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Hall Band, Omga and diaphragm

An ‘Inhiband’ made of steel (invented by Dr Herbert Hall), a coil that is labelled as a ‘diaphragm’ (right), and an Omga copper coil (centre), probably from France, already heavily oxidised (turquoise in colour). Mounted on black cardboard.

Inventory number: 1863
Material: plastic, steel, polymer plasthyd with copper
Dimensions, in cm: 16,8 x 10 x 0,4
Condition: the OMGA is in poor (oxidised) condition; the mounting card is also tattered
Donor: Robert Snowden