MY "NEW GUN" MADE IN 1882 IS A 12 GAUGE ,GH. IT HAS A SERPERTINE TOP LEVER ,IS THIS UNUSAL? IT IS NOT MENTIONED IN MY PARKER LETTER . THE STOCK BOOK WAS MISSING ON THIS GUN, BUT THE LETTER SHOWS ,DAMASCUS,32' F/F,CAPPED PISTOL GRIP.ANYONE LIKE TO GIVE ME ADVICE ON THIS? MY QUESTION IS, IS SERPENTINE TOP LEVER UNUSUAL??JOHN STINAUER.