Derek K. Miller gets it:
I spent many a year pounding my fingers on an Extended II, in university and as a freelance technical writer. The IBM 101 is a very different beast, also built like a tank but with a more metallic, punchy feel, and an audible note to its astoundingly loud typing sound.
He’s got photos of his collection over at Flickr.
For what it’s worth, I’ve gotten a slew of recommendations this week from IBM keyboard aficionados, recommending keyboards from Unicomp, a company that still makes IBM-style keyboards with buckling spring key switches.