I guess I missed something (or maybe I saved myself a lot of money). This is a Reilly SxS .410 side lever hammer gun. It was in the Holts sealed bid December auction that I completely missed. I can't imagine a .410 in anything like restorable shape going for this price but still wish I had known - temptation sharpens the senses.

https://www.holtsauctioneers.com/as...++8556+&refno=++164645&saletype=

E.M. REILLY & CO. .410 DOUBLE-BARRELLED SIDELEVER HAMMERGUN, serial no. 25853, circa 1883, originally with black powder only damascus barrels. Estimate £15-25

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]