Colt Model 1855 Sidehammer Pocket Revolver

[3] In spite of the complexity and ambition of its patented design, the Sidehammer revolver never became a popular gun.

The image contains a pioneer defending himself against an attack by six Indians in Seminole-style attire using a pair of revolver pistols while (presumably) his wife and child are escaping.

Along the top of the scene (the edge of the cylinder which is closest to the pistol barrel) is a "finely detailed wavy line and dot border".

[5] Models 3, 4, and 5 had a fluted cylinder (with indentations between the loading chambers), preventing the application of a continuously engraved scene.

Models 6 and 7 had a round cylinder, with the rolled-on "Stagecoach Holdup" scene by W. L. Ormsby.

[1] The revolving mechanism of the cylinder was also used by Colt in the following long arms, in rifle and carbine configurations:[6]

Colt Root 1855 Revolver, Model 7, cal .31
USMA Cadet George Armstrong Custer with Colt Sidehammer pistol about 1859
Original 1855 patent of the gun, still with the zig-zag cylinder