The stuff that comes with vintage double barrel shotguns is almost as cool as the guns themselves. Leather cases, oil bottles, snap caps — they’re part of the history and magic of a vintage firearm.

Here are some interesting accessories that are Ebay now. One of them may be just right for your old side by side shotgun.
W. Richards Leather Case: W. Richards has been making double barrel shotguns since 1780. If you own one, this original case with label would be a great home for it.
J. Purdey 12 gauge Nickel Plated Snap Caps: The real thing, and essential if you own a Purdey shotgun. These appear to be in excellent shape.
Holland & Holland Pewter Oil Bottle & Snap Caps: Another essential case accessory. Make your H & H double barrel shotgun feel at home.