OG - POOR- major or minor parts replaced; major replacement parts required and extensive restoration needed; metal deeply pitted; principal lettering, numerals and design obliterated, wood badly scratched, bruised, cracked or broken; mechanically inoperative; generally undesirable as a collectors firearm in its present state.

NPRF - NON-PROFESSIONALLY REFINISHED/COLD BLUE, ETC.

WB - WOOD IS BETTER FOR THE PERCENT OF FINISH RATING GIVEN

Single shot variant manufactured by Robbins and Lawrence in c. 1850-1851 later modified into a muzzleloading rifle.