Obviously I haven't completely understood the question...but from my database here are the known Reilly box-locks: the earliest 22482 is 1880. the oldest is the last extant Reilly with a serial number from 1912. 75 out of about 250 extant guns from 1881-1912 - 27%. The premise on these Reillys' is:
1) if Reily serial numbered them, he made them;
2) they all have London proofs on the barrels;
3) rifles will have pistol grips or half pistol grips - if a shotgun has that, it likely was repurposed from a rifle or was a big bore fowler.
There are exceptions and now because of this line I'm going back through the photos looking for workers' initials. I can post the descriptions and photos of these guns if it would help history.

Interesting side-light...1st existing Reilly Boxlock was an ejector - wonder if it was added later. Because it is my impression that until about 1885 there was no great demand for ejectors..at least according to the Rigby-Perks lawsuit 1893:

[Linked Image from jpgbox.com]

22482 - E.M. Reilly & Co., (address not mentioned), 12 bore SxS Shotgun. BLE. A&D use # 1156
23236 - E.M. Reilly & Co., Oxford Street, London & rue Scribe, Paris. 12 bore. Shotgun SxS. Top lever. BLE, W-R pattern. A&D patent use #1366.
23536 - E.M. Reilly & Co., 277, Oxford Street, London. Shotgun SxS 12 ga. BLE. Steel Barrels. (A&D Patent use #3814 )(1st use of renumbered addresses 277, 16)
25038 - E.M. Reilly & Co., New Oxford Sreet, London & rue Scribe, Paris. 12 Bore Shotgun SxS. Top lever, hammerless. Scott/Baker pat 761, use #200; Needham/Hinton sears (Pat 705) 1879 patent.
25171 - E.M. Reilly & Co., 315, Oxford St., London. 12 bore, top-lever Box Lock. #1 of pair (non-extant)
25172 - E.M. Reilly & Co., 315, Oxford St., London. 12 bore, top-lever Box Lock. #2 of pair
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
25516 - E.M. Reilly & Co., (no address). 12 bore. Shotgun SxS. top lever, box lock, side ejector.
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
25724 - E.M. Reilly & Co., (no address, sleeved). 12 ga SxS Shotgun. BLE; fine scroll work.
25741 - E.M. Reilly & Co., 522?*, Oxford Street, London W(sic)??. 28 ga. Shotgun (likely originally a rifle) SxS, BLNE. (barrels may have been changed)
26218 - E.M. Reilly & Co., (no address mentioned). 12ga. Shotgun SxS. BLNE. (originally a rifle)
26584 - E.M. Reilly & Co., 16, New Oxford Street, London & rue Scribe, Paris. 12 bore Shotgun SxS. BLNE. (A&D use #8072)
26718 - E.M. Reilly & Co., (address not mentioned). .380 cal. Rifle Black Powder. BLNE. 7 lbs 5 oz.
26730 - E.M. Reilly & Co., 16, New Oxford Street, London and rue Scribe, Paris. 12 bore. Top key BLNE.
26879 - E.M. Reilly & Co., (action, Stock, Forearm only). 12 bore SxS shotgun. BLNE
27478*- E.M. Reilly & Co., (rebarreled by midland). 12 bore SxS shotgun. A&D BLNE. (SN 7478 - *2 hypothetical).
27665 - E.M. Reilly & Co., 277, Oxford Street, London; 12 ga Shotgun Single barrel. Top lever BLNE. "Not for Ball"
28502 - E.M. Reilly & Co., (address not mentioned). 12 bore, Shotgun SxS. BLNE.
28650 - E.M. Reilly & Co., 277, Oxford Street, London. 12 ga Shotgun SxS. Top lever, BLE. AD pat; Ejector Anson pat of 1884.
30152 - E.M. Reilly & Co., (address not mentioned). 12 bore SxS Shotgun. BLNE.
30247 - E.M. Reilly & Co., 16, New Oxford Street., London. 12 ga. Shotgun SxS. BLE.
30257 - E.M. Reilly & Co., no address. 12ga. Shotgun SxS. Boxlock.
30260 - E.M. Reilly & Co., 16, New Oxford Street, London. 12 bore Shotgun SxS. Steel barrels boxlock.
303xx - E.M. Reilly & Co., 277, Oxford Street, London. 12 ga. Shotgun SxS. Steel barrels. BLE, Built on W-R action. Not for Ball.
303xx?- E.M. Reilly & Co., 277, Oxford Street, London. 12 ga, Shotgun SxS. BLE. Top lever.
30342 - E.M. Reilly & ? (London address obscured), rue..Paris? (on 2nd barrel). 12 ga. Shotgun SxS. Boxlock hammerless live pigeon gun.
30255 - E.M. Reilly & Co., 277, Oxford Street, London; 28 ga Shotgun SxS. Top lever, BLE. 27” sleeved brls, semi-pistol grip (orig. rifle?)
30363 - E.M. Reilly & Co., 277, Oxford Street, London. 12 ga. Shotgun SxS. BLE. Top lever, Steel barrels. Built on W-R action. A&D ejector pat #428; Anson & Deely pat use #6250. #1 of pair.
303xx - E.M. Reilly & Co., 277, Oxford Street, London. 12 ga. Shotgun SxS. BLE, Top lever, Steel barrels. Built on W-R action. A&D ejector pat #427; Anson & Deely pat use #6265. #2 of pair (Norway)
30375 - E.M. Reilly & Co., (no address - sleeved). 12ga. Shotgun SxS. BLE. Top Lever. Anson & Deeley #1 of pair
30376 - E.M. Reilly & Co., (no address - sleeved). 12ga. Shotgun SxS. BLE. Top Lever. Anson & Deeley #2 of pair
30446 - E.M. Reilly & Co., 277, Oxford street, London. 12 bore, Shotgun SxS. BLE, doll's head W-R type top-lever; 30" Damascus. AD Patent use #7156
30456 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. Top lever Box lock.
30768 - E.M. Reilly & Co., 16, New Oxford Street, London. 12 ga. Shotgun SxS. BLE. A&D patent use #8245. (A&D Patent expired sep 1889).
30791 - E.M. Reilly & Co., 16, New Oxford Street, London. .380 BPE. Rifle SxS. Box lock. A&D boxlock pat use #????.
30846 - E.M. Reilly & Co., (address not mentioned. 450 BPE. Rifle SxS. BLE. Steel barrels.
32530 - E.M. Reilly & Co., (address not mentioned). .500 Rifle SxS. BLE.
32543 - E.M. Reilly & Co., (28” reproofed steel barrels, no address). 12 bore, BLE, treble grip action. #1 of pair
32581 - E.M. Reilly & Co., (address not mentioned). 16 bore Shotgun SxS; T-L, BLE.
32661 - E.M. Reilly & Co., (address not mentioned). 12 ga, shotgun SxS, BLE, self-opener.
32665 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. BLE.
32667 - E.M. Reilly & Co., New Oxford Street, London. 12 ga. Shotgun SxS. BLE.
32971 - E.M. Reilly & Co., 16, New Oxford Street, London. 12 ga. Shotgun SxS. Boxlock.
32974 - E.M. Reilly & Co., 16, New Oxford Street, London. 12 ga. Shotgun SxS. Boxlock. Ball and Shot.
33239 - E.M. Reilly & Co., (address not mentioned); 12 bore, shotgun SxS, BLE. Doll's head.
33241 - E.M. Reilly & Co., London. (sleeved no address). 12 ga. Shotgun SxS. Steel barrels. BLE, Built on W-R action. #1 of pair. (non-extant)
33242 - E.M. Reilly & Co., London. (address unknown). 12 ga. Shotgun SxS. BLE, Steel brls. Built on W-R action. #2 of pair.
33244 - E.M. Reilly & Co,, (stock/forearm only). 12 bore SxS Shotgun. BLE.
33256 - E.M. Reilly & Co., (address not mentioned). 16 bore SxS Shotgun. BLNE.
33358 - E.M. Reilly & Co., 277, Oxford Street, London. 12 bore Shotgun SxS, BLE (steel sleeved barrels)
33428 - E.M. Reilly & Co., (address not mentioned). 10 bore, .550x3.5 SxS BPE rifle. BLNE. Pistol grip stock w/cheekpiece. Anson forend.
33640 - E.M. Reilly & Co., (action, stock, forearm only) 12 bore SxS shotgun. BLE
33713 - E.M. Reilly & Co., 277, Oxford Street, London. 12 ga SxS. Shotgun. BLNE. Steel barrels.
33881 - E.M. Reilly & Co., 277, Oxford Street, London. 12 ga. Shotgun SxS. Top lever, BLE, Steel brls.(2 brl set).
33889 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. Top lever, side lock, BLE, Steel brls. #1 of pair. (non-extant).
33890 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. Top lever, side lock, BLE, Steel brls. #2 of pair.
32941 - E.M. Reilly & Co., (sleeved barrels). 12 bore Shotgun SxS. BLE.
34250 - E.M. Reilly & Co., (address not mentioned) 12 bore SxS Shotgun BLNE.
34334 - E.M. Reilly & Co., (Stock, action, fore-arm). 12 ga, Shotgun SxS. Top lever, BLE.
34478 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. Boxlock.
34515 - E.M. Reilly & Co., 16, New Oxford Street, London. .500 BPE, SxS rifle. BLNE. Steel barrels
34680 - E.M. Reilly & Co., (address not mentioned). 12 bore. Shotgun SxS. BLE.
34865 - E.M. Reilly & Co., 277, Oxford Street, London. 12 bore. Shotgun SxS. BLE.
35058 - E.M. Reilly & Co., 277, Oxford Street, London. 12 bore SxS shotgun. BLE
35097 - E.M. Reilly & Co., (stock and action only). 28 ga, Shotgun SxS. BLE.
35186 - E.M. Reilly & Co., 277, Oxford Street, London. 12 bore. Shotgun SxS. BLE. Steel barrels. Post 1898 trade label. London 1896-1904 proof marks
35367 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. BLE. Steel Barrels.
35394 - E.M. Reilly & Co., (address not mentioned). 12 ga. Shotgun SxS. BLE. Steel Barrels.
35398 - E.M. Reilly & Co., 295, Oxford Street, London; 12 bore SxS shotgun BLE, treble grip. (First SN with 295 Oxford.)
35407 - E.M. Reilly & Co., (28” sleeved barrels). 12 bore SxS Shotgun. Top Lever, BLE
35422 - E.M. Reilly & Co., (Action/stock/forearm only). 12 bore SxS shotgun., BLE (#1 of pair to the below gun).
35423 - E.M. Reilly & Co., 295, Oxford Street, London. 12 ga. Shotgun SxS. BLE. #2 of pair.
35458 - E.M. Reilly & Co., (address not mentioned). 12 bore. Shotgun SxS. Boxlock.
35472 - E.M. Reilly & Co., (sleeved, no address). 12 ga. Shotgun SxS. Boxlock.
35554 - E.M. Reilly & Co., 295, Oxford Street, London. .500/.465 SxS Nitro Express rifle, BLE.
35678 - E.M. Reilly & Co., (address not mentioned). 12 bore Shotgun SxS. Boxlock. (Last extant Reilly)

Last edited by Argo44; 10/11/21 11:15 PM.

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