VESA 50 bracket

I have been playing with cheap chinese one piece fanless PC units, and many of them have a set of VESA 50 holes on the bottom or side. Well, is VESA 50 even a standard? Looks like 100 is the smallest, but if there was a 50, this would match it.

This design is technically done though it does not do much on its own. It is basically an adaptor to connect to further pieces for accessories or enclosures.

Oh and my printer runs a little small so if you are properly calibrated, scale to 97% or so.