Here is a mid-to-late 1980s mouse by Logitech, which, in its day, outsold the Microsoft Mouse 

This is a 3-button Logitech C7 mouse with a serial interface.  Most Logitech C7 mice used a 9-pin serial port, but this one is 25-pin, so it can connect directly to a serial port of an IBM PC or XT without an adapter. 

Buyer will receive the exact item pictured here.

I include a 30 day return privilege and free shipping to any U.S. zip code.