Here is the response I got from Gibson .
Thanks for writing. Unfortunately, we don’t have the tuner specs in our records for this time period, but the fretboard would have been ebony. I’ve attached an early ad for you to take a look at. Thank you for the inquiry.
You would think they would have the info on the products that they sell but I guess not. They did even address
the type of pickups the Studio came with. In the ad they sent is say Alder for the wood. This is pretty sad.
CW