Cordys

A 24-inch ebony three-bar parallel rule

Estimate: $150 - $250


Lot Description

A 24-inch ebony three-bar parallel rule, marked 'Potter, Poultry, London', with brass hinges, (John Potter worked at 31 Poultry, City of London and became instrument maker to the Admiralty). Provenance: The H.N.E Sheppard Estate Collection.