Tested. Working perfect. See photo. With CPU Pentium MMX 166MHz, 32MB EDO RAM and cooler
 
Chipset VIA VT82C580VPX (Apollo VPX/97)
Socket Socket 7 (PGA321)
FSB speeds 50MHz60MHz66MHz
Form factor Baby AT (max 220 x 330 mm)
Dimensions 254mm x 218mm
Cache 512KB
Max RAM size 384MB
RAM types 72-pin EDOSDR UDIMM
PSU connector AT (6-pin P8 + 6-pin P9)
I/O ports
1x  AT Keyboard
1x  Floppy interface
1x Gameport
2x IDE interface
1x PS/2 mouse
1x Parallel
2x Serial
Expansion slots
2x 16-bit ISA
4x32-bit PCI