The J. Stevens Arms & Tool Co. No. 225, 250, 260, and 270 were the hammer doubles with the mono-bloc barrels --
In the 1910 or so time frame the J. Stevens Arms & Tool Co. changed their method of barrel construction to what they called Demi-Bloc, otherwise known as chopper lump --
The No. 235 was the box-frame entry-level gun of the Demi-Bloc guns --
While the higher grades were sidelocks --
All of these J. Stevens Arms & Tool Co. top-lever doubles, from the No. 250 as shown in the circa 1900 catalog No. 50 onward for made for nitro powders --
