BBC Goerz Metrawatt Unigor 6e multimeter type 226236 

I might try to scan the back gor the future. Perhaps it could be laser etched or something along those lines when in the future it could use a reprint.

Finally you got the real one, Thomas. Unfortunately, yours has had a very hard life in the past. Otherwise the 6e, at 1% in all voltage and current ranges both DC and AC, I think is the most accurate analog multimeter in existence. The one I got was totally dead when I got it. It turned out, all its electrolytic condensors were gone. After I exchanged them and set back its chopper frequency to 205 Hz it was as accurate as brand new. Your electrolytes seem to have been exchanged already. Originally they had green tantalum drops and yours has blue ones. Maybe you have to readjust the chopper also to get back full accuracy. There is an excellent service Manual for the 6e, but it is unobtainium. At least there is a user manual at elektrotanya. Capacitances are measured with a chopped up internal current source source, so you do not need external AC for that and the voltage drop across capacitances is a few mV except in 1 and 10 nF range, so you can measure capacitances in circuit most of the times.

👍

That had to be arcing for a little while to cause that kind of damage, impressive indeed.

This thing is way more impressive than it lets on.

Ah, nostalgia. We used Unigors (not sure which model) at school late 80's / early 90's in the Netherlands. They are nice. I only do not like the parallax 😉