When did double-shot keytops disappear?

[John Allain]

> When did double-shot keytops disappear?


When they invented the Sharpie?

Hey, nasty.  I just looked at my HP 1405 (ps/2) and 1429 (hphil) 
keyboards and, while the coloring matches ages old HP color
choices, no sign of the 2 shot.

You have reminded me that my IBM-M kb collection (dozens)
may not be a crazy thing after all, doesn't take up much space
certainly.

Does anyone make ADB-USB adaptors for the cool design
old Mac keyboards?

John A.