The_Penguin, you and I have the same Tandy/Radio Shack voltmeter, 50k ohm/v, with "Range Doubler". Don't use it much anymore, but I keep it because it was my very first meter. Am also keeping several RS books from the era, Transistor Projects 1 and 3 etc.
It was one of my first meters too, and a pretty good one. I worked for Radio Shack from '76 to '79 back in the good days.
I actually have 3 of them, 2 working.
I couldn't find my original one, so got one off of ebay, but the meter movement didn't survive shipping.
Got a second off of ebay, then a while later found my dad's in a box of stuff while moving my mom to a new condo.
My first meter was my dad's old Heathkit, would love to have that one again, it was really bullet proof.
I have another Radio Shack DMM in the drawer too.