I am trying to figure out who made this and date of manufacture, caliber etc. I have looked all over this double and cannot find a maker, or even gauge. The left is 16 gauge, and the right probably 10mm .404 with a caliper. Here are a few pics, any help would be appreciated.

[Linked Image from i.imgur.com]
[img]https://imgur.com/jlrGSrE[/img]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]