Educated guess, haven't seen one like that, but have done lots of wired edges. You are taught to use the chisel end, so did it work? probably wasn't a big seller. Some people modify a linesman's pliers to finish the wired edge, there is a hand cranked set of dies for the easy edgers / jenny's. Probably the closest thing I have seen to the end is the a set of pullmax dies I made to finish the wired edge on a late 20's Chrysler fenders. I've got ??? about 5 or 6 tinner's hammers none with a concave edge.