I have played drums for over 45 years and my first drums (still have them) were Ludwig. I have seen kits like this labeled as "Fab 4". The finish is nothing special. It is a wrap that Ludwig calls "Black Oyster Pearl". The original Ludwig oyster finishes in the 60's were called "Oyster Black Pearl" and "Oyster Blue Pearl". The wrap on the drums you are considering is more like the "Oyster Black Pearl" from the early 70's, when Ludwig's founder, William F. Ludwig, Sr., passed control to William F. Ludwig, Jr.. For some reason, WFL Jr. found it necessary to change the finishes and ultimately cost Ludwig thousands of sales. The oyster finishes from the early 70's were also referred to as "bowling ball finishes". They were not as desirable as the earlier oyster colors.
Ludwig reissued the "Original Oyster Black Pearl" finish last year, but it is no longer on their web site. I really don't know if I have the wording correct on the reissued models, but in the grand Ludwig fashion, the name was misleading. The wrap was not the original type. The original had clear areas where you could actually see the grain of the mahogany or mahogany stain underneath. The newer reissued "original" did not contain these clear areas. I have stated that the wood underneath the wrap was mahogany or mahogany stain due to the fact that there are certain "professors" out there that claim all older Ludwig drums contained mahogany wood. The people who made these drums with the oyster finishes have told me that there was no mahogany, the wood was stained a particular dark burgundy color, then the wrap applied. Since I was not part of the process, I do not claim to know which way is correct. I will not be breaking my old drums apart anytime soon just to find out !!