hey STEVE, got out my FLAYDERMANS book this morn . i found and read up on the different locks. the gun is a ''back action '' type , twist barrels , striaghtline checkering , yet shallow. the rear tang of the triggerguard is very long. all of the triggerguard,and top tang are covered in engraving, as well as all screw heads. wood to metal fit is superb. i could detect no looseness by allowing the gun to rest in my left hand and bumping the buttplate with my right,,,,same principle as testing a baseball bat or cedar arrows for cracks.
the gun appears to have been fired , using mainly the right barrel , which i thought may be a common thing among those ol' shooters.