Here are the pictures, I will sell the keyboards later in a sale thread (user who contacted me already get a discount).
The keyboards come with two types of switches, to my luck it turned out that 9 have mx browns and 2 mitsumi miniature mechanical switches.
MX brown
wiki/Cherry_MX_Brown
Mitsumi minature mechanical (tactile, yellow stem)
wiki/Mitsumi_miniature_mechanical
wiki/File:Mitsumi_miniature_mechanical_ ... _table.jpg
The keycaps are lasered and printed. The are all Devlin Q series.
wiki/Devlin_Q_series
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The keyboards have a metall case (case + underside). They are really nice and sturdy (~2,6kg).
The switches are plate mounted (both types) and the keyboard is Devlin branded (also the PCB).
I dont know if they have diodes, but the matrix seems really easy to adapt (simple 7x18). I think I will convert one with a teensy, there is a socket at the top of the PCB which will make that easy.
Now the pictures:
More Detailed pictures:
Mitsumi variant PCB
Controller
