Not technically a keyboard, but the beginning phase of a Topre switch tester/key display I'm going to make from a board that's been broken down for parts:
Pretty rough right now (I'm not very good at keeping my hands steady because I have bootleg parkinsons), but I'll cut down the left edge to make it symmetrical width with the right, and do the same with the bottom side to pair with the top, then mount it all on acrylic or something. The layout of the tester will be:
Row 1 - Stock Topre Sliders
Row 2 - Purple/Silenced Topre Sliders
Row 3 - Novatouch Sliders
Row 4 - No idea, maybe cut it off
Column 1 - 30g
Column 2 - 45g
Column 3 - 55g
Then maybe get a case made to put it all in to give the keys some thock/hide the cuts.
edit- and with caps (temporary cardboard base results in varying height)