It's not serious if a Bristol Spline _key_ goes
astray, that was never
part of the original machine.
Maybe not for the PC's we're talking about here, but many pieces of
classic equipment contain the special tools needed to work on them.
For example, many R-390A's have brackets on the back for the Bristol Spline
key and screwdriver, Tek scopes with ceramic terminal strips have a
little spool of the right kind of silver-bearing solder on a holder
inside, etc. For the nuts who insist on 100% authenticity, having the
original tools/rolls of solder does matter. There was a case last week
of a single spool of normal tin-lead solder selling for hundreds of $
just because of the name on the label!
Tim.