Thank you gentlemen. I noticed that the gun in the GunsInternational.com ad also has the JT in a circle mark similar to this one. Each of the tubes is marked with a crowned K. For now, these are all the pictures I have until I pick up the gun.

The bad news is the stock was cut for a recoil pad and the outside of the barrels have some slight surface rust that I hope will clean up. However, the bores are clean and the gun seemed tight - although in need of a very good cleaning.