These interesting self-defense handguns are discussed in "Firearms Curiosa" by Winant and pictured on page 159. The design for this unusual weapon was patented in the U.K. on September 5, 1877, and then the U.S. on November 6, 1877. This revolver appears to be a coin purse at first glance but contains a folding trigger pinfire revolver within with the serial number "602" on the recoil shield on the right, "2" on the back of the cylinder, "602" on the rear of the right blast shield, and a "crown/Z" proof on the left side of the frame at the rear. The trigger folds down and through the bottom of the purse so that the revolver can be fired without opening the purse itself. The top of the case has "FRANKENAU'S PATENT." There is also a small cover for the muzzle. It is also numbered "602" by hand inside the metal body of the purse. The revolver compartment also has an ejector rod and is perforated on the lid to aid in heat dissipation. The other compartment can hold money or other items.