I am an electronics novice. :)
I opened a working Casio vintage desk calculator (likely from the late 1980s/early 1990s). It has a 220 volt step-down transformer with six secondary wires. The two mains wires go into the transformer at the bottom. The 6 wires come out from the sides (three on each side). Following are the related images:
I found out continuity among the secondary wires as follows:
Purple-Grey-Purple: Continuity (side one)
Orange-Red-Brown: Continuity (side two)
However, the wires are wired to six separate contacts on the circuit board.
Are there differences in terms of voltage among each set of wires coming from the same side? If each carries a different voltage, how can I test this with my multimeter? I would appreciate guidance for using my multimeter safely/correctly.
If there are no differences among each set of wires exhibiting continuity, why were they wired separately?
Also, do the markings on the transformer mean anything? There's also another, smaller marking (not visible in the images) that says "E41-2L11/2".
Update: The calculator has an integrated printer, and therefore a motor. (Thank you TimWescott.)
Update: Calculator display: