Not sure when VLB came out since there were proprietary local bus slots out a while before there was a concrete standard. Yea, I googled a bunch of bad 24bit EISA threads (different chipset from the same company) and a bunch of stuff in Russian but little else. I think this might be an early 486SX/DX VLB board. The chip itself is marked Japan (not sure if that means made in Japan or designed there) so how bad can it be?
Odd I never seen one before since I have used just about every 486 board made at some point in time.