I had just never seen one that popped out the left side of the fences before. So I was a bit confused. The American doubles I have aren't finer guns. I have a LeFever Nitro Special, Riverside 215, and again, that French St. Etienne guild gun. Most of my shotguns are either slide-action or semi-automatic.
I don't have this one in my hands yet, but I went ahead and bought it. Seemed like a reasonable price for the gun once I looked up the name. $720 before shipping thanks to a discount (shipping was only $30). Here's the link to it. It'll be the first British double I've ever owned.
https://www.ows-ammo.com/british12-gauge-side-by-side-shotgun-made-by-j-robertson?___SID=U