Pro Beat outfit first appears in the 71 catalog. ALL the outfits were the same drums, just different size and hardware combinations so there is no difference between a 9x13 tom found in a Pro Beat, or Hollywood, or Super Classic, or Deluxe Classic, etc. etc. except for, possibly, the placement of the mounting bracket relative to the badge depending on whether it was meant to be mounted on the left or right in that particular configuration.
While the drums were the same I'd say the Pro-Beat was considered to be one of the higher end set-ups with the larger sized toms that were coming into fashion just then.
BTW: that wrap was called Gold Sparkle by Ludwig. There was a Gold Mist wrap too which was a similar color but was a thinner version of the wrap with finer grade sparkles. Gold Mist was only used on Ludwig's Standard line of drums which were a lower cost line they produced from approx. 1968-1972. Because of that you'd be better off to use the proper name "Gold Sparkle" to avoid any confusion.
Here's the Pro Beat from the '71 Catalog. There was a gap of a couple of years between catalogs and by '71 the drums had the B/O badge design. Since yours have the Keystone badge I'd surmise that they were a very early example of a Pro Beat from 1969(ish) which would pre-date their first catalog appearance. Someone else posted about such a kit just the other day, perhaps these are the same drums or it's a bit of a coincidence. They could also have been a special order set, which certainly makes them no less valid as a set of drums, especially since Ludwig did make an outfit in those same sizes (the only question is exactly when they started doing so).