The basic Sea Service pattern was used from the mid-18th century into the early 19th century by the Royal Navy around the globe including during the French & Indian War, American Revolution, War of 1812, and Napoleonic Wars. "TOWER" marked at the tail of the lock, St. Edward's crown above "GR" and "crown/broad arrow" marked at the center of the lock, the left rear of the barrel is marked with two British proof marks, barrel made without sight provisions, full walnut stock with a brass trigger guard and fittings, a 7 1/2 inch iron belt hook marked with a crown mounted on to the brass left side plate, a broad arrow above "1805" date stamped on the top right wrist of the stock, and a wooden ramrod with a swollen brass tip.

"TOWER" marked at the tail of the lock, St. Edward's crown above "GR" and "crown/broad arrow" marked at the center of the lock, the left rear of the barrel is marked with two British proof marks, barrel made without sight provisions, full walnut stock with a brass trigger guard and fittings, a 7 1/2 inch iron belt hook marked with a crown mounted on to the brass left side plate, two opposing broad arrows stamped on top of the stock wrist, and a modern replacement wooden ramrod with a swollen brass tip.