I agree with Longjohn, at least in posting another pic with a head removed.
My opinion, however, is that these are a very late 1979 or very early 1980 Pearl Export. They actually started using a wood composite shell at that time.
If these are in their original condition (without upgrades or other modifications), they are probably not wood-fiberglass unless it was an end-of-the-run, use up the shells type of factory thing (like Ludwig would do). Pearl's w/fg line was (along with the fg shells) their top-of-the-line offering in the 70s... and that single-post double tom mount was only used on their less expensive drums. Also, the BD appears to be a 22, but only has 8/16 lugs. The claws and T-rods are also the "cheaper" ones. I can't see them in the picture, but the FT leg brackets could also give a clue.
And, I know it's also hard to tell from the pictures, but the wrap appears to be the darker, "blue flash" variety that made it's appearance in 1979 and into the 80s as opposed to the "blue satin" or "blue gloss" of the bulk of the 70s...
Also... I've yet to see a Pearl w/fg set without the "wood fiberglass" badges, except in the case of drums previously rewrapped.
Just my thoughts, based upon what I see. More pictures would be nice!
Regardless, these drums appear to be in very good condition for their age! Have they been yours all along? In any case, they have been very well taken care of!