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I like that it goes up to 11.
What is it? A 1980's calculator?
With a Nixie tube display like that, you're usually looking at much earlier.
I found this on that model: https://www.oldcalculatormuseum.com/monroe620.html
I have no idea - I saved the picture with the idea of making a JavaScript image-map replica to play with, but haven't been able to find any documentation or manuals for it yet?
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