Original British Napoleonic Royal Navy Gunner's Cannonball Calipers from H.M.S. Northumberland (1798) Brunswick Rifle see photo's for condition

see photo's for condition

The rods also have different-sized rings

The neck immediately under the ball for a depth of almost 2" is bound in neatly woven fine copper wire

Tragically their leader

McMains & Meyer Publishers

Original British Napoleonic Royal Navy Gunner's Cannonball Calipers from H.M.S. Northumberland (1798) Brunswick Rifle see photo's for conditionOriginal Item: One of a Kind Set. These are extraordinary, being British Naval Gunner's Calipers for measuring Cannon Balls aboard ship during the Napoleonic Wars. Measuring 26" on each leg, these measured the diameter of the large Cannon Balls, ensuring they are delivered to the correct sized Cannons from the Storage Magazines. One leg bears a brass plaque on one arm simply stating: H. M. S. Northumberland H. M. S. Northumberland was built in 1798 at