Original IBM PC keyboard, Mac extended, Mark Ten terminal, and the one I am
using right now labeled Micron made by NMB Technology model RT5158TW.
Several of the Mac early keyboards are really nice, full smooth travel, but
I think the best is the original extended.
I am appalled by most current keyboards, short mushy travel, poor feel, and
short life. I've started looking through all the keyboard piles I find for
another good one like this Micron.