Here is a very nice example of a fairly early tool in 40-60. Notice that this one has the Marlin patent stamps and is marked with the caliber stamp, but the sprue cutter stop pin is unslotted as seen in earlier tools like this 45-70 one or this 45-60 W-K one. The tool shown below was found in Germany ,and, at the time of this writing, continues to "live" there...it sure would be nice to know how, when and why it got there!