The eye pieces have a few numbers on them, G20X and 12.2, they are made by Olympus. I'm assuming the 20X is the power.
...It's very simple to operate, I don't think I'll need the instructions for this but if anyone has some to share that would be appreciated. There is very little information about this scope that I can find on the internet. The focus is a little stiff so I may need to clean it out and re-lube the gears. One thing I noticed when adjusting the mirror is that I get a dark field effect, is this normal for stereo scopes? I do enjoy the stereo effect, I think I'm going to have fun with this one.
Congratulations!! the stereoscope is a source of fun right from the start.
If finding the instruction manual on Google is futile, I would try and ask Alan Wood through his web site, he is extremely nice and helpful.
I use my scope at the low mag (10 X 1=10) most of the time, the (10 X 4 = 40) is much less useful since the working space is shallow.
the G20X(12.2) is indeed 20X power, 12.2 field diameter. On my microscope, I prefer lower power and wider field. I purchased a pair of non-brand WF10X/23 eyepieces, quite inexpensive of eBay, and I enjoy them a lot. Olympus also offered eyepieces GWH10X(23) and 15X for the VM microscopes, almost sure they fit on the VT.
I cleaned the focusing gear of my stereoscope and lubricated it with Nyogel 767A grease.
The option of simultaneous illumination, trans- and epi-, is a great benefit.