Help Identifying double barrell percussion shotgun

[JAMESIVTA]

I inherited this gun and am having trouble identifying the maker and any other information about it. It appears to be in very good shape, with a lot of ingraving and a damascus barrell. Any help with any info would be greatly appreciated. I did get a close up of what appears to be the maker it is on each side of the gun.gun

 

[bpd303]

It's a fine looking shotgun, probably made around 1840 as the back action lock was introduced around that time period. I'm thinking English made, there should be proof marks on the underside of the barrels which would narrow the search. The marking on the lock looks like Rither to me but I'm not familiar with the name. There is some marking on the center rib between the barrels but I can't make out what is says from the picture.

 

[Splitear]

Nice looking piece.

It looks like there was a couple of gun makers (perhaps father/son) named Kither out of Kent. John and George. 1820’s-1850’s.

https://archivingindustry.com/Gunsandgunmakers/directory-k.pdf

http://www.researchpress.co.uk/rppu...4-english-welsh-gunmakers-1550-1850-v1705.pdf