Power Macintosh 6100
Also available under the "Performa" and "Workgroup Server" model lines. The Power Macintosh 6100 also offered the "DOS Compatible" model which featured a 486DX2/66 on an expansion card.
This model, along with the Power Macintosh 7100 and 8100, should be capable of running the Copland MacOS betas.
Available with either a 60MHz or 66MHz PowerPC 601 processor.
If the PRAM battery is dead or missing, the computer will likely not display any video upon being powered on. Without using a new battery, you can try the "double-tap" method which is pushing the power button twice quickly and it may restore video signal.