Looks like a 4 tier mother setup, and maybe another module in the case above the sub37?
The FOUR TOP … 
, looks like it is enclosed in a solid case on both ends, not metal ones currently being sold. Probably starting to get a little weight challenge.
Man, the Four Tops have to sound crazy. Ground control to Major Tom, commencing count down LFO’s on, 4, 3, 2, 1.
I am also curious what the thing sitting above the Sub 37 is. Another module for the Mother? Is it also related to the Sub 37?
Above the Sub is another Mother in another type of Eurocase
Stranded in the Desert surround by mother-32’s and a Sub37, life is good!
