Celtic bronze balance beam and lead weight, Isle of Man, 8th century.

Cord pivot, balance and set of weights, ivory, Persian, 16th century.

Egyptian card-pivot, wooden beam balance and weights, 1370-1350 BC.

Prehistoric Egyptian limestone balances and weights, 5000 - 7000 BC.

Hooke's spring, c 1679.

Short-beam analytical balance and weights, 1876.

Measuring balance, Persian, 1700-1900.

100 ounce 'Auctioneers' Plate Valuing' balance and weights, 1901-1902.

Roman balance and weights, AD 350.

Circular spring balance, 18th century.

Miller's vacuum balance, 1870.

Short-beam analytical balance, 1876.