From what I see through the drill holes... the toms are thin layer of Maple on the inside and then a thicker layer of poplar and then a thin outer ply of mahogany.The kick drum looks like maple-poplar-maple... The wrap is really thin on the bass drum.
Looks more and more to me like as someone already suggested above that these are standard 3-ply Slingerland shells with the re-rings taken off.
They then painted the interiors, rewrapped them and put on Tama hardware.