The G4X had the Sedra 9000 on it. I believe' it's been renamed the G4+, and yes, that's the MSX skimmer next to it. Hmm..now that I'm looking at the old pic, I guess I bought the one with 2 sicce pumps....I could have sworn it was three. Oh well, it was the MSX 300.
If your skimmer is 24" tall, you probably have the G4.