It sounds like a Beige G3 Desktop to me. Would be 233, 266, or 300 MHz.
I ran Jaguar fine on a Beige G3/300 with a Zip, CD, Floppy, 6 GB hard drive and a BTO video card (iXMicro 3D 8 MB VRAM + 6 MB VRAM on MoBo).
Overclocking those suckers is easy - check it out at xlr8yourmac.com - I had...