Apparently the collection of - Craig Gruber (Rainbow, etc.) is up for sale. Not a whole lot of info on any of them, but fun to look at.
https://ebay.us/m/HLmF7z

He also had a Maple 1978 Series I he purchased new. He told me that bass had 3 million miles on it a couple of years before he passed away.

Wonder where it is now.

Oh wow! Super cool.