One of the horribly compromised x2xx series Macs, which did 64-bit operations through 32-bit, 16-bit and
8-bit buses to save 10c on a chip. Quite possibly the most compromised Macs ever built. I used to have one, we called it the "iTurd". It could just about crawl Mozilla 1.3. We eventually just used it as an oversized desk clock.
http://lowendmac.com/roadapples/x200.shtml (scroll down past the script errors for the text)