It was the 07G0033 PS/2 Miniature Mouse. I bet most
PS/2 mice would work.
In looking over the documentation, no mouse was included at first.
Obviously added later, especially since WIndows 3.1 is installed on
the machine.
Minor revision - it is called "Office-on-the-Road", not
"Office-on-the-Go". The set includes a plug and cable for powering
from a car cigarette lighter.
--
Will