Pope did indeed make barrels for bolt action rifles, and also for pistols. The marking on your barrel is likely from his later years in the Colgate Building in Jersey City, NJ. The two numbers under the forearm are not what you see on earlier barrels, but his earlier barrels were also left hand twist. I'd guess one of those is Pope's barel number, and likely it's the higher of those two. His later barrels were also done as right hand twist, so not unusual to find a RH twist Pope barrel in later years.
This is a really great find, and better than almost any other named maker's barrels. Well worthy of a nice Mauser action to fit it to. I have 5 Pope barreled rifles, and one Remington Model 1891 target pistol Pope barreled and modified for Olympic shooting. Top pistol in this picture. Bottom is an Arthur Hubalek built version:
![[Linked Image from i.imgur.com]](https://i.imgur.com/H26nVaql.jpg)