What about this 1996 PowerPC?
http://www.webalice.it/beniamino.cenci.goga/68k/Power_Macintosh_7600.html
http://www.webalice.it/beniamino.cenci.goga/68k/Power_Macintosh_7600.html
You can't go my unflattering shot, this is more like it: a pair in a 2005 school computer lab.
By do you mean the U.K. iMac table conversion kit? http://www.mactechnology.co.uk/imac-g3-table-drawer-loading-cd-drive---complete-5-p.asp
Got all of you beat so far. Performa 6115 running at a whopping 60MHz.
The Macintosh LC is not a PowerPC Macintosh. It is an Motorola 680X0 one with a Motorola 68020 CPU running at 12Mhz.
Here's a Macintosh LC I had. I don't actually have it anymore, but this is a picture I sent to a buddy when I had it set up to sell. Had 6.0.8 on it.
Edit: I was just posting this as an old Mac, not PowerPC. To be clear, this isn't a PowerPC.