Hi everyone. Back in 1977 I received an HP-67, supposedly brand-new. I always suspected that they gave me a used one, however, but all I have is a hunch -- no evidence.
If you took the calculator and shook it, the keys rattled, for they were pretty loose. Some keys had different feel from others. I remember particularly well that the (i) key felt funny and had no tactile feedback the way the other keys did.
At the same time a friend of mine had an HP-65 (on loan from someone else), and I distinctly remember that the 65 had none of the keyboard problems my 67 did.
The 67 gave me excellent service, mind you, but even after 26 years, I'm still curious about that machine's keyboard.
-Ernie