Brass weights
Two weights marked "2". This number could be referring to specific gravity (Sg) measurement, but this is unclear.
Hydrometer, silver, probably Swiss, probably 1801-1850, with weights
Two weights marked "2". This number could be referring to specific gravity (Sg) measurement, but this is unclear.
Weight marked "15". This number could be referring to specific gravity (Sg) measurement, but this is unclear.
Weight marked "20". This number could be referring to specific gravity (Sg) measurement, but this is unclear.
Weight marked "30". This number could be referring to specific gravity (Sg) measurement, but this is unclear.
Hydrometer, silver, probably Swiss, probably 1801-1850