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Part identification: Board mount rotary switch

I have a CPAP machine whose dial broke off. Was hoping to 3D print a replacement, but I don’t see an obvious way to attach it. I figure finding the specification would help.

Has 3 leads on the bottom, 2 on the top (not visible), and one lead on each side.

There’s some marking on the bottom, but I can’t make them out.

Anyone know the part?

Switch image with board

Closeup of markings

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