For many years, I used nothing else. I have had, and expect I can find them all if I look hard enough, a I, II, III, IV, and a V. I started with the IV in 1964, got it brand new. At one time, I started worrying about what to do, since I expected that the cells wouldn't last forever, and bought a Gossen Luna Pro F, since I was doing lots of work with flash at the time, too. I like the null reading feature a lot. I despise digital meters, digital clocks, and cameras that have liquid crystal displays with numbers on them. Gimme a dial.
Yes, the Weston meter dial is a fantastic tool. In AA's early basic photo books (the five volume set) he explores it thoroughly. At least one school I worked at had a really large version of it made of stiff cardboard for demonstration purposes.
Actually, I believe I have also a very early pre-master Weston which still has a calibration ticket. I bought it in the late '70's at a camera store in Port Townshend Washington. It appears not to have been used as the calibration ticket is attached with a string. It is a rectangular brick shaped thing (smaller than a brick, though, and a lot lighter) made of bakelite or something similar. It is laid out horizontally with the meter face on one side, and a dial on the other. As I recall, the dial isn't the same as the Master dial.
Guess I'd best have one or more of these things serviced while I still can.