If you want a Sverdlovsk 4 manual, somebody posted an English translation on the Web a few months ago.
Concerning batteries, if you search eBay on "1/2 AA battery" or "3.6v AA battery" you'll find half-AA-sized batteries that produce 3.6v. Radio Shack also has these (item #Dead Link Removed), but they're much more expensive than most of the eBay sellers. These batteries work fine in the Sverdlovsk 4, although they're just a little bigger than optimum. (The bottom plate that covers the battery compartment tends to push out just a bit.)
FWIW, I've also got a Sverdlovsk 4. It seems to be much more reliable than the selenium-cell meters I've also got (a couple of old GEs and a Leningrad 4).
The Leningrads have an outstanding reputation of uselessness and unreliability. One guy wrote a text describing its features and make quite well:
1.) Assembly
The body of the Leningrad 4 consists mainly of fiber-reinforced corrugated cardboard with uranium ornaments.
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