This Trixon has the tear-drop lugs which were used until around 1962. And the birch or beech 4mm-thick, 3-ply shells with 3-ply reinforcing rings, which according to Ingo Winterberg in his Trixon book were standard up till about 1960/61.
Also, until 1962/63 Trixon shells were metric sizes, so international heads won’t fit. Thus, for example, the nominally 20"x16" bass drum is slightly undersized at 50cm x 40cm. The other nominal sizes are 13"x81⁄4", 16"x16" and 14"x5" snare drum with parallel strainer mechanism.
Trixon triple-flanged hoops are bent inwards at the top in a similar manner to Slingerland’s, and the lug bolts have slot-headed screws, typical of European drums of the period.