Hello,
first of all, apologies if this post doesn't fit this subforum properly, so please either move it or delete it.
In a recently uploaded video about an R-32 computer that was built in Poland in the mid-1970s (that can be watched here: ), a pretty uncommon test gear appears: an unknown 6-digit nixie multimeter and an SS-6100 "Synchroscope".
As for the "Synchroscope" name, it was pretty easy to find on the Internet: that's an Iwatsu's series of oscilloscopes, however this specific model seems to be also not widely known.
I'm rather more interested in the multimeter shown, and it would be lovely if anyone could recognize what this multimeter brand was - from what I can see, it's labelled as "Precision Digital Meter Type 7501" (or 2501 or 2581?). One of my friends suggested that it could be some Yokogawa equipment, as a Model 2501A did exist, but it's very difficult to find any information either way. It's also possible that it was some super-rare locally-made (or Russian/GDR-made) stuff, but to my eye, it looks too well-built in terms of quality.
Screenshots attached.
Thank you for any answers. Kind regards