Fordyce Beals & Remington 24 Shot Revolver
How about a U.S. mfg 24 shot cap and ball revolver??
Revolving cylinder percussion pistol. 24 shot cylinder has 2 banks of chambers. A double loading rammer is located beneath the barrel. The barrel pivots to fire either the outside or the inside bank of chambers. Design attributed to Fordyce Beals and possibly manufactured by Remington.