"Guild" is typically used as a synonym for "nameless" in this country, rather than a gun that an apprentice made as the final project for his journeyman ticket--and I think the latter would be quite rare.
What many people don't understand about nameless guns is that they were made the same way a lot of guns with names were made. That is, made "in the trade"--with each specialist contributing within his specialty (barrelmaker, stocker, actioner, engraver, etc)--rather than all under one roof. Using that definition, especially prior to WWII, "guild" guns were quite common from just about every country in Europe with a firearms industry. As a percentage, I think, you probably see more nameless French guns than anything else, with Belgium maybe a close second. But a fair number of British guns, especially boxlocks--regardless of the name on the barrels--were also made the same way, by outworkers in Birmingham. The name you find on the barrels is of the dealer/gunsmith who sold the gun, and who might very well have finished it but not much else. On a French gun, if the barrels carry an address that's anything other than St Etienne or Paris, chances are excellent that it was made "in the trade" in St Etienne and simply sold elsewhere.
