Rare Mac SE/30 Processor accelerator card

This is for a Apple Mac SE/30 60830 processor accelerator. Very rare! Might also work with the SE. I believe this card upgrades your SE/30 to 25 or 50 mhz, I can’t remember exactly what the speed was. It also has a math coprocessor onboard. MicroMac Inc. manufactured this card. $35 shipped

I can take a picture if needed also.