On 16/07/2015 00:13, Jay Jaeger wrote:
One size fits very many, but not all. I know for sure that the PDP-8/L, PDP-8/m, PDP-12, PDP-11/20, PDP-11/40, PDP-11/45 and VAX-11/780 all use the same xx2247 key. My PDP-11/24 has a silly plastic "anti static" key, but the xx2247 works there, too. But my PDP-11/05 and GT40 use a different kind of more "normal looking" key.
To the best of my knowledge, there are only three keys: the tubular XX2247 which is used on most -8s and -11s including my 8/es and 11/34, the one that looks like a filing cabinet key used on just a few machines (all keyed alike), and the plastic "key" used on later Vaxen as well as the 11/24 - albeit in a variety of colours of plastic.
-- Pete Pete Turnbull
