Hello:

I'm attempting to find out more about who might have made this English 360 No. 5 rook rifle, as there's no maker's name engraved anywhere on the gun.

This rifle has a .366 groove diameter and will accept 38 Special cartridges. It has a nice piece of walnut with steel butt plate and horn forend tip.
There are London proof marks on the left side of the breech, but I don’t know what the small scrolled ‘R’ stamp means. There’s a single standing and single folding leaf sight marked ‘50 YRDS’ and ‘100 YRDS’. The muzzle has an unusual convex crown, with about 1/4” of unrifled and over-size bore inside the barrel.

I can shoot about a 4” group at 50 yards with hollow-based wad cutter 38 Special ammunition. I would like to try a larger heeled .366 bullet, but I’ll need a custom mould for that.

It may have been made by Webley, as it looks like many guns illustrated online and in "The Classic British Rook and Rabbit Rifle" book.

Please see pictures below. Your thoughts and comments are welcome, thank you!

https://imgur.com/gallery/T38R61r

mbatten