Cutting Edge Quatro 850
The Cutting Edge Quatro 850 is actually a Centris 650 repackaged in a larger, more expandable case. According to EveryMac.com, Apple somehow attempted to put a stop to the production of these units as Cutting Edge did not have a MacOS license.
The Quatro 850 shipped standard with 8 MB RAM and a 270 MB hard drive. This unit has been upgraded to 44 MB RAM and two 500 MB hard drives.
The panel around the ports is a bit crude in comparison's to Apple's casing. Note the NUBUS slot covers.