Crap. I don't remember where I got this link, so I hope it's not some other gun bloggers'.
It's a contemporary account about firearms ballistic investigation of the Saint Valentines Day Massacre, among other things. And you know I am a sucker for old publications.
[update. found it. i saw it on Firearm Blog apparently and had forgotten.]
Begali Key Tester At Dayton Hamvention - Mechanical innovator and key designer par excellence Pietro Begali's key tester, or, as he puts it, "Digital driving mechanical driving digital." The sol...
3 hours ago