Antique J. Davis & Son Opisometer Original Leather Case

A fascinating antique opisometer (also known as a map measurer) by J. Davis & Son, complete with its original fitted leather case and aged paper label. This precision instrument was used to measure distances on maps, converting between inches, miles, and kilometers.

Details:

• Maker: J. Davis & Son, Derby, England

• Length (in case): 7.8 cm

• Width (in case): 4.2 cm

• Material: Chrome/metal body with glass dial cover

• Dial markings: Inches to miles, centimeters to kilometers

Features:

• Clear dual-scale dial

• Brass rolling wheel tip

• Large loop for holding or attaching to chain

• Comes in original leather pouch with vintage label

Condition Notes:

• Light tarnishing and age-related wear consistent with age

• Case shows surface wear and label is partially faded

• Mechanism intact and rotates freely (not tested for measurement accuracy)

A collectible piece for lovers of cartography, surveying tools, or early engineering instruments.