I am not really in the know for all of this, but seems to make logical sense, just a bit of simple comprehensional skills. Doubs picked right up on the thought presented; but of course, he has been around a while and is quite knowledgeable.
We read a lot here about firing pin shape. Round is round sorta speak; kinda like right is right........anything less could be trouble sometime.
I learned about making a perfectly round cut at the end of a rectangular cut, sights for African rifle with blades. Getting the round to be perfect for the wedge, ie no line show, was a trip for me. Did not happen the first time.
I would suspect that the round in the tool could be done with a wheel or small ball mill, either one custom ground probably; but for a supplied machine shop, no big deal.........precision grinder.
I remember these German tools, so marked, and with the same shape features come out of digs in later times, then sold on the markets abroad. A friend in Berlin was generous enough to share a few with me...............never used them, depth mic is my friend; but for the collector, a tool like this seems appropriate...........of course collectors like originality. That asking price seems a bit out of line, but I have not been in the Luger deal for a good while.
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