I wrote:
  The Computer History Museum in Mountain View CA USA
has a 360/30.  I hope
 we can restore it someday. 
William wrote:
  IBM. Tough stuff. 
Henk wrote:
  Why is restoring IBM stuff so tough ? 
Suppose we try to restore the 360/30, and one of the hybrid SLT
modules is bad.  Where do you suppose we'll find a replacement?  Most
likely we would have to try to fabricate one, assuming that we could
find or reverse-engineer a schematic for the particular module.
By comparison, restoring a machine like a PDP-1 is a piece of cake,
because all of the components are readily visible.
Eric