For your consideration is a rare PDS expansion card for early Macintosh computers. This is the Impact 030 by Extreme Systems. This card features a 33MHz 68030 main processor, a 68882 math coprocessor, and an onboard cache. I haven't seen anything like it anywhere!

I have tested it in my LCII and Color Classic. Please see the listing photos for an example. It may work in other model computers such as the original LC, but I cannot be sure. Only the expansion card is included in this auction - the Color Classic and monitor were shown only to demonstrate functionality. Thank you for looking and have a great day!