Sunn 4x12 guitar speaker cabinet staggered Alnico Early 1970's

I have been a huge Leslie West fan since 1971 or so, and that was a big thing towards my love for Sunn gear- this cabinet in particular, like the ones I have seen in the old Mountain videos. I don't see many of these, 4x12 staggered cabinets, 2 Alnico 12" speakers with Sunn  labels. Shows a good bit of wear, has wheels, sounds great! had some kind of hole in the back, like maybe for another jack plate, which was covered up with metal. It's a road warrior from those glorious days of rock and roll. Thanks for looking!