Genovation have been making macropads for quite some time, but before descending into scratchy and heavy Cherry MX Blacks, they used Alps White switches.
I got this in NIB condition. Quite pricey though, about 74 USD includes shipping.
Box includes floppy disk for MacroMaster driver, male 5 pin DIN to female PS/2 gender and cable, female 5 pin DIN to male PS/2 gender and cable.
Because I don't know why but the board has both DIN female and male attached to each side. Quite thoughtful of them to include both cable and gender.
The board itself is quite light, everything made of plastic and seemingly hollow.
Since Whites are clicky switches that does leaves some noises after pressing but I do somehow find it enjoyable.
Although being light, build quality is excellent actually, half-transparent keycap covers for key printings does have some injection marks but it's easily handled by sandpaper.
The board works great with Soarer's converter. I connected it to my monitor USB passthrough port.
The problem is that my PC doesn't have AT protocol so whilst it inputs, the PC doesn't recognize the board. Which means I can't add new macros to the board