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So EL-506P, EL-512, PB-110 and PC-1250A all have a logo on the back that looks like the Greek letters Beta and Eta merged together. What does this logo mean?

[My guess: there was an industrial design firm used by both manufacturers and this was their logo.. but who were they?]

You can see it next to "Casio" on the back of this fx-602p:

(09-22-2021 01:20 PM)jhallen Wrote: [ -> ]So EL-506P, EL-512, PB-110 and PC-1250A all have a logo on the back that looks like the Greek letters Beta and Eta merged together. What does this logo mean?

This is the BM mark as explained very well on the epocalc site.

Thanks! Had no idea..