I saw Billy Cobham on the Stratus tour playing a full Sonor kit like that. Funny thing that they didn't seem to last long. The answer to a question that nobody asked.
Those are late 1970's concert toms made by North Drum company, made of Fiber Glass & had the strongest cast metal lug casings I ever seen ! They made entire drum sets but proved to heavy for field drum uses. These should have been tuned up ??