Patented in 1894 by William Mason, who also designed the swing-out cylinder for Colt, the Model 1894 Winchester reloading tool combined all of the necessary tools/functions for reloading cartridges into one small hand-held tool. These tools are fairly rare and desirable in any caliber, but this example is a true scarcity being for the .50-110 Winchester Express caliber, the largest cartridge available for Winchester's lever guns. It is marked with the four-line Winchester address, and patent marking on the side of the body, and "50-110 EX." is marked on the bullet seating die portion.