I have a meter like this. It works as far as I can understand, except one filter disc (color matching disc?) is probably blocked. I tried it out a bit, fascinating but too difficult for me. That's why I'm sticking with my Seconic L758. I have 2 PDFs that I would like to attach here, but the files are too big. In one of these documents there is also a kind of repair manual.
If someone is interested I could send it by mail
I also share a link
http://www.robertsuomala.com/5.html
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