I got a heathkit two tube multimeter, which has a lovely simpson analog meter and two tubes inside. It tickles me to no end that this thing is still ticking over beautifully but that the five or so multimeters I have owned until now, digital no-name units one and all, have died various ignominious deaths.
Here is an internal view of the tubular goodness inside....
That Duracell just went in there today replacing a Mallory cell from the 70s.
A network of resistors on a multiplanar rotary dial switch forms the heart of the instrument. I imagine a father and son building this in a basment in East York circa 1965 then going to the corner store for a cold bottle of Coca Cola in the original glass bottles.