This c. 1850s percussion revolver looks similar to the transitional revolvers but has a more complex Joseph Lang "gas seal" action that locks the cylinder for each shot and also moves it forward slightly creating a smaller cylinder gap. The blued barrel is fitted with dovetailed bead and notch sighs, is signed “PARKER, FIELD & SONS, 233, HOLBORN, LONDON” on the top flat, and is struck with London proof marks and the serial number on the underside. A Parker, Field & Sons designed loading rammer is fitted to the right side and has “REGISTERED BY/PARKER, FIELD & SONS” and a pivoting casehardened stirrup finely engraved with scrollwork. The casehardened cylinder has the matching serial number and London proof marks. The casehardened action is scroll engraved and has the serial number on the underside and the lower tang, and it is fitted with a finely checkered walnut grip with a blank silver wrist escutcheon and flared pommel with an engraved cap with a compartment.

Fine with 85% original blued finish on the barrel, patterns of muted original case colors, gray and brown patina on the balance, distinct engraving and markings, and minor wear. The grip is also fine and has minor wear in the otherwise crisp checkering. Mechanically fine.