Not helpful to the question, but
http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=484762 Union Fire Arms Company was incorporated in Toledo, OH in 1902 by George B. Colton, and was successor to Colton Manufacturing Company (1894-1902). Union Fire Arms Company continued supplying Sears and others with double barrels under the names Union Arms Company (c.1910), Illinois Arms Company (Sears) and Bee Bee Arms Company.
Note "Nitro-Steel" barrels less than pattern welded, and were likely Decarbonized steel
Here's one
https://www.gunauction.com/buy/5485787 
