I think its a Intel Premiere PCI ED (Batman) OEM board but its not exactly quite the same. RTC is uout of place
It has an AT keyboard conector but PS/2 Keyboard and Mouse port pad on the circuit board.
BIOS 617325-001 (1.00.03.AF1)
Got a good old SX835 C1 stepping Pentium 60, so should have FDIV bug
I also have a D1 Stepped PCPU5V60 without