This Wheeler, Madden and Clemson saw is a small version of what was designed as a two hand rip saw handle. The blade is only 18″ long. Looking at the following catalog is could be the no. 28 made with double extra refined spring steel.
Unfortunately the original blade was too pitted to use and this is a replacement. The horn has been repaired with a new piece of apple. It saws really well, I wonder what sawing with ripsaw with this kind of handle would be like.