In this image, you can see, from the right, a 16-bit ISA slot (occupied by a controller card), an 8-bit ISA slot, four more 16-bit ISA slots, and two of these strange slots that look like a 16-bit ISA slot, except with an 86-contact extension rather than the normal 36-contact extension. These are definitely not VLB extensions. I found this page on the motherboard, which says they are some sort of "32-bit external memory card." What are these slots? Are they compatible with 8-bit or even 16-bit ISA?
This is only one of this computer's oddities. The controller card, while sporting a typical floppy connector (the solder ends of which are visible at the top right), also has a strange 34-pin connector (keyed differently from the floppy connector and visible immediately below it) labeled "winchester", as well as two 20-pin connectors (visible below the "winchester" connector) labeled "drive 0" and "drive 1". The winchester and drive 0 connectors both connect to a very (physically) large Seagate? ST-251 hard drive.