I'm trying to gather information about the different varieties of Mice that were used on Lisa and early Mac systems. I'm looking for additions/clarifications to this list, specifically which mouse would have been shipped with which system, and if mouse #2 ever existed. Jeff -- #1 - Original Lisa Mouse (Lisa and possibly early Lisa2?): Had a metal ball, long rectangular button, and a "clip"-type retension mechanism on the connector. The mouse port on the Lisa did NOT have metal around the connector as is common on DB-9 female connectors. Instead, there was a plastic "lip" to which the retension clip on the mouse would mate. The bottom of the mouse was sloped and did not have a sharp angle like the M0100 mice. The mouse had a tan colored cord. #2 - (Early Lisa2?): Same as #1 but with standard DB-9 connector instead of the clip-type retension mechainism. Each thumbscrew had an Apple logo embossed at the ends. #3 - Early M0100 (Possibly later Lisa2/Mac XL): Button was not as slender as the Original Lisa Mouse and had a standard DB-9 male connector instead of the clip-type retension mechanism. Each thumbscrew had an Apple logo embossed at the ends. Both the button and cord were tan colored. #4 - Later M0100 (Apple II?): Same as Early M0100 but had a gray button and cord instead of the tan button and cord. The thumbscrews did not have the embossed Apple logos and were somewhat thinner. The internal mechanism was also slightly different than the Early M0100 and are not interchangable.