Baker briefly offered a steel barrel version of their Paragon around 1897 called the $100 Pigeon Gun. It featured a straight grip, steel barrels and Pigeons in the engraving. A bit later there was a Krupp barrel version of the Paragon called the N-Grade. The way Baker continually changed grades and designations, and usually didn't put grade markings on their guns, adds a degree of difficulty to evaluating them.
Many of the U.S. double gun manufacturers used tubes imported from Belgium or France in addition to the "name" tubes from Krupp in Germany and Whitworth in England.