There is one more, not so well known album from Mahavishnu Mark 1.
Can only see it within the Columbia Albums Collection which I bought for the remastered versions and this missing piece

The first albums remastered. I heard little if any difference so don't all hit the "Buy" button just yet.
The unique album is the catchily titled
Bonus Disc : Unreleased tracks from Between Nothingness and Eternity

I like Between Nothingness and Eternity a lot and would not be without it so this box set had to come to me.
The last 7 tracks on Spotty are the ones that make up the bonus album



You may like it but I'm not that keen.
Tracks already available on studio albums and significantly better IMO.
Sound quality seems a step or two down

Worth the purchase is you are a completionist, a rabid fan or you see it cheap on and don't have any or many of the other albums

Had I been able to hear it before I bought the box set I could have saved a few bob