This is a Bosconian cabinet. Some of them were converted to Galaga at the factory as Bosconians didn't sell very well. I am not sure if this is a factory conversion or done after the fact. I am skeptical about it being HUO because the control panel overlay has been either cut back to hide the edge wear or replaced with a non-original one and the kick panel artwork has been trimmed back on the top corners - not sure why.

These typically don't sell for any more $$ than a normal Galaga. If it needs a monitor rebuild, I'd say $500 tops.