Re: AVO Multimeter survey
The EA113 was the Uk market version of this instrument. The original design was the Avometer models 14, 15, 16 and 20. These actually came from demand overseas, and so were designed for the foreign market. The EA113 came along a little later.
I have never heard of a model 21S but yes it seems to be a Swedish Special.
The collection I have at Megger (formerly Avo) for our museum includes 2 Ea113, but none of the others models.
What a fantastic find..... Keep it in good condition!
Andy
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