This sleeve pistol was described in Elek B. Juhasy's August 27, 1929 patent as an "automatic concealed firearm for self defense." The rifled barrel unscrews for loading and fires a .30 caliber center fire cartridge. The pistol is fastened to a leather strap by a metal stiffener which is marked "PATENTED E. CARLSTROM CHICAGO/4852S MAY ST./U.S.A." The leather strap has elastic bands to fit around the forearm. A striker similar to that found on pen pistols is pulled back in order to cock the gun. The striker is released when the operator pulls back on a wire that is attached to a ring on the middle finger by flipping the hand upwards. The pistol has a two piece black box. This pistol is described in Lewis Winant's book FIREARMS CURIOSA, pages 161-162.