not mine, but have a thing for octagon barrels right now so am looking around for fun.
shellhammer

looks like a octagon to round with full length rib, the checkering is sweet to boot.

Red

Really beautiful!!

Tom Shellhammer did some nice work. Time-wise, he was on the cusp of the "Glitz" era, with exaggerated cheek pieces, reverse-taper forends, inlays, white line spacers, flared pistol grips, etc. Fortunately, Tom stayed on the more conservative side of the fence, where Roy Weatherby, Harry Lawson, and a few others jumped the fence and hit the ground running!!!

Tom Shelhamer.

That barrel is really spectacular.