Apart from the unrecognized branding on the CPU (ceramic; upper-right in photo) chip, this appears to be a bog standard ISA '386 motherboard, probably running at 25 MHz.
- CPU looks like the right packaging for a 80386
- Empty 80387 FPU socket
- Quadtel "386" BIOS with appropriate late-80s Copyright
- 50.0MHz oscillator adjacent to CPU; usually provided 2x the CPU clock
- Typical VIA chipset
Of course, normal Intel or AMD branding on the CPU chip would make it obvious. I'd be concerned about the provenance of the CPU that is installed.