BBK-both Pearl and Star used 3 rings on the 3 ply shells. And my WMP, although not "Pearl", is a Pearl stencil and has rings on all three drums. Again, very resonant. The easier way to date them is this, as best we have gleaned. First, the shells themselcves. If the real thin, 3 ply/re-rings, they are pre-67. Both seemed to have switched at this time. Second will be the rail or pipe or someother type of tom mounts. Star used a couple of different tom mout set-ups, and Pearl, it seems, was much more experimental where they were concerned, so we see all kinds of Pearl mounts, pipe, solid hexagonal, rail, etc. The pipe mounts usually indicate later builds. The hex is from 71 on, I think, but O'bop will straighten that out.
When Pearl was first making drums, was the middle re-ring used a lot on the bass drum? Also, has anyone ever seen a Pearl kit with re-rings on all the drums and not have badges? I looked at a kit this weekend that was definitely Pearl hardware, but no badges nor signs of badges, and all original... BBK