Slapper, it ain't how many aces you're holding--it's the number of cards in your deck--us old timers are holding alot of cards, maybe even some up our sleeves.
For an old fart, two correct answers out to be worth a second rack of ribs!
Rob, although I had not seen your tool you posted first, I recognize the box, stones and the electrical tool from some time between 1944 and 1948 when my Dad had an International Farmall M in the shop for a valve job--at the time the shop was grinding the valve seats in the head. Never did see the angle setting device used. I also recognize the magazine ad from the same era but can't recall the source.
Pretry strange that I recall that stuff but can't remember where I last put my little flashlight during a job!!!