This is the elusive D9810 series that was the last of the digital CRT 27's because the VGA is mounted on the deflection board. I actually have a dead 9810 board on my shelf. the model number can be confirmed as a sticker on the edge of the board to the right of the VGA connector in between the transformer and the capacitor
the video inputs on a separate input/sync board mounted to the frame on the D9200/9400 series so it's def not one of those.
There is literally ZERO documentation on this board. the closest it comes to is the D9500. If you need repair documentation or specs, you might have to contact WG directly.