Elektronika MK-52: The MK-61 big brother?

[Adalin]

I got another mk-52 to see if it was me or if it was the calculator which was faulty, and the eeprom in this new one works as it should.

One interesting thing about the mk-52 seems to be what kind of plastic they used for the different details, this one is from 1987 and the lid is the same plastic as the screen cover, dark transparent green, and some of the buttons is a light brown/gray color rather than the light gray color they should be.

The lid on the 1991 one is dark grey/black

there was a lot of different color variants apparently, maybe they got some plastic over and didn't want to throw it away so they made lids of it instead.

the coloring of the function printing differ also, much lighter blue color than the 1991 one and easier to read.

I still haven't got the replacement eeproms but I will try to replace it when it arrives.