I have one of those aluminum Pickett slide rules in a leather case that I used in my High School Electronics class.
I also have a Heathkit VTVM (vacuum tube voltmeter). It still works but the rubber covered test leads are rotted.
One instrument I always loved to use was a Simpson 260 VOM. Years ago I moved on to Digital meters, the one use is made by Fluke, but i missed the feel you could get when using an analog meter, so I bought a good used 260 for $50 and love to use it.
Mike in Salt Lake