A pair of miniature double trumpet hearing aids, English, c 1865.

Swan shaped silver hearing aid trumpet, English, c 1865.

Experimental steel alloys, 1820-1824.

Hunting trousse, c.1570.

Sir Robert Abbott Hadfield, English metallurgist, early 20th century.

Corrigan's Button Cautery, Dublin, Ireland, c.1850.

Upper denture, English, 1780-1870.

Baker-Brown's cautery clamps, French, 1841-1900.

Objects made from celluloid, 1920s-1930s.

Surgical instrument film props, 2001.

Steel tuning fork with oval grip and circular stand, c 1869-1874.

Tuning fork, c 1869-1874.