Just for kicks, went back to look at the case. I was trying to figure out who might have a extant gun that would fit this two barrel or double-gun case.
-- I really think the label is limited from 1884-mid-1885. So that severely limits the number of extant Reilly's that could have used the case..about 28 are in my database.
-- The gun would have 30" shotgun barrels (front slot) and from the looks of the back barrel slot, 26" rifle barrels... 30" barrels would eliminate .410's or 28 gauge.
-- I don't know what that extended space is at the chamber end of the barrels - but it does look like originally the barrels fit into their slots vertically?
-- The space for the stock looks to have no room for hammers. And it looks very deep. Is it possible that two stocks could have been stacked on top of each other?
-- And what is that slot for at the end of the stock cavity?
-- For a gun authentically to fit the case it would have to have the New Oxford Street address on the rib....it may or may not have had rue Scribe , Paris on the rib. There are a number of guns which didn't have the address published in the ads - sleeved or barrels missing so you might get away with putting one of those into the case..but of those which do have the New Oxford Street address, below is the list - not a lot.
-- Now where do you find an extra barrel? Or a second gun?
Here are the only extant Reilly's that might benefit from this original case: -- of course, the list could be stretched backwards or forwards...but getting back into 1883, there are still Reilly guns being labeled with the old 502 New Oxford Street address on their ribs...going forwards, as I did for my 1897 gun 34723, the gun would fit but would not be authentic.
26530 - E.M. Reilly & Co., New Oxford Street, London. .450. BPE SxS rifle. U-L, Hammer gun, 3 1/4” chamber’s. 28” brls.
26554 - E.M. Reilly & Co., 16, New Oxford Street, London & rue Scribe, Paris; .450 Cal Rifle SxS. U-L, hammer gun. Steel barrels. (SN ara "26434").
26584 - E.M. Reilly & Co., 16, New Oxford Street, London & rue Scribe, Paris. 12 bore Shotgun SxS. BLNE.
(A&D use #8072)26730 - E.M. Reilly & Co., 16, New Oxford Street, London and rue Scribe, Paris. 12 bore. Top key BLNE
26781 - E.M. Reilly & Co., 16, New Oxford Street, London & rue Scribe Paris. .360 BPE, SxS rifle. AD Boxlock; W-R "C" fastener, Top Lever.
26880 - E.M. Reilly & Co., 16, New Oxfort Street, London & Paris. .500 Rifle SxS. BPE U-L, hammer gun.
27340- E.M. Reilly & Co., Oxford Street, London & rue Scribe, Paris. 12 bore. Shotgun SxS. hammer gun.
(Last SN w/rue Scribe)Stretching list by going back to 1883:
25449 - E.M. Reilly & Co., 16, late 502, New Oxford Street, London & rue Scribe, Paris. 28 ga Shotgun (originally a rifle) SxS, top lever, hammerless.
Anson fore grip 1872 patent use #7757 25513 - E.M. Reilly & Co., 16, New Oxford Street, London and rue Scribe, Paris. 10 bore SxS shotgun. Top lever, BLNE, Pistol grip;
A&D use #4343 25519 - E.M. Reilly & Co., 16, New Oxford Street, London & Paris. 12 bore SxS shotgun. Top lever, BLNE. 7 lbs 6 oz, .0018, .0024 chokes.
A&D use #3976 (Pigeon gun)
25592 - E.M. Reilly & Co., 16, New Oxford Street, London. 12 bore. SxS shotgun. U-L, hammer gun.
If you eliminate the hammer guns...you're down to about 6.