By General Catalog No. 52 (Revised Edition), J. Stevens Arms & Tool Co. had changed their method of barrel construction to what they called Demi-Bloc, which most of us know as chopped lump.





They dropped Twist and Damascus barrels and the sidelock hammer doubles became the No. 255 and No. 265 --



The No. 255 and No. 265 remained through the last J. Stevens Arms & Tool Co. catalogs and price lists, but didn't survive into the J. Stevens Arms Co. era.