Opti 386 motherboard with Am386 DX-40 processor +RAM | eBay
Tube Time on X: "this is the LARGEST motherboard i have ever seen. it is 15.75 inches by an incredible 20 inches wide! it absolutely dwarfs the more normal 386 motherboard in
VLSI 386 Motherboard 8 x 72 pin simm's 7 x ISA slots i386 SX NC 80386SX-25 CPU | eBay
DOS Days - Chips & Technologies i386 Motherboard (1988) - Part 1
USED Mystery Circuit Board 386 Motherboard NEC-16T - GridChoice.com
Intel PC motherboard with i386-33 processor | 102652373 | Computer History Museum