Other Sphere computers exist although they are rare. This particular Sphere computer is one of a kind because it is the one that belonged to the founder of Sphere Corporation, Mike Wise.
David Larsen has a great collection in Virginia. He has managed to save two Sphere computers.
Scott Adams tells how he sold the Sphere he bought years ago to a collector in Florida.
The Computer History Museum has two Spheres...a System 320 and a System 330. Both look to be kits or, perhaps, have undergone some "modifications".
For more information, click on the link(s) below.
     David Larsen's Sphere computers

     Adam's story

     Computer History Museum

If you know the location of any other of these, please let us know by contacting us at info@EarlyComputers.com.