It shouldn't be too difficult to prove the existence of "root beer sparkle". Removing some lugs should expose the original non faded wrap. Maxwell could have done it and really shed some light on this topic. In addition to his mistaken comment about Black Sparkle his comment that the kit is "early" 70's and all original is incorrect. If the kit is "early" 70's it is not all original (mid 70's and up for chrome inlay BD hoops).
slingerfan! You're right on all counts! Yes, I also questioned about that kit being an early 70's, which it is not! I had a 1975 BR 80N kit, in original red sparkle, that came with chrome inlay strips. I did change them to matching red sparkle. So, we can guestimate that around 1975 is when the chrome strips were used.
As to the Root Beer controversy, yes, removing a lug would certainly have been the way to prove this. Still, that kit just looks too evenly shaded on all drums to be faded black sparkle.
Here's a link to a set from Reverb. Based on the aluminum Setomatic mounts and muffler knobs, this kit is probably a 1968. Again, the finish just doesn't look like it faded from black sparkle... https://reverb.com/item/2639422-slingerland-black-root-beer-sparkle-drum-kit-early-1970s-22-13-16
We sometimes take the position that anything that Dr. CJ says must be true. Still, there is evidence that root beer was uncatalogued. Also, let's not forget how many shades of blue sparkle there are! Made it really difficult to add more drums later on, due to color variances!
Still, I'd love to find one of these drums and remove some lugs!
-Mark