This is the bomb. If you are serious about Alps switches, this is the chassis that you want to put your switches into.
These old Northgates are incredibly well-built, even featuring a heavy baked-enamel bottom pan.
Approximately 1-2 years ago, I bought 3 of these in the $60-100 range. Only 1 was significantly nicer than this one, the other 2 displaying varying degrees of yellowing and keycap shininess.
They do break, (and I have a broken one that I will probably sell in the $25-30 + shipping range when I find all the parts) but are sturdy old stock.
*It was my fault, I messed up a few of the pads removing the original switches (white Alps, nice when new but bad when dirty). My soldering iron was dying and I did not realize it, now I realize that it was probably too cold and when I was trying to pry up bent-over pins they were still stuck in the original solder!