A FINE & RARE CASED 20/.577, late 19th Century

(ALEXANDER HENRY BLACK POWDER EXPRESS) DOUBLE-BARRELLED ROTARY-UNDERLEVER SIDELOCK NON-EJECTOR BIG GAME RIFLE...; With browned 28 in. (71 cm.) twist black powder only barrels sighted to 200 yards, case-hardened action with doll's head extension and