Scales, steel beam
1700-1850
Scales, steel beam with copper pans
1750-1850
Scales, apothecary's, cased
1825-1870
Optometer, objective or subjective
1831-1900
Optometer, objective or subjective
1831-1900
Balance, 1751-1850
1751-1850
Optometer, objective or subjective
1801-1900
Set of coin scales with steel beam
1801-1900
Scales, iron beam with copper pans
1750-1850
Scales, steel beam
1700-1850
Coin scales
1801-1900
Steel beam from apothecary's balance
1801-1900