Official Vintage Microsoft Serial Mouse 2.0 (Model 66915). Featuring the classic two-button design and mechanical ball tracking, this mouse uses the 9-pin DB9 serial connector—perfect for DOS, Windows 3.1, or early Windows 95 builds.

• Connector: 9-Pin Serial (DB9)
• Model: 66915
• Year: Early 1990s era
• Compatibility: Essential for vintage hardware without PS/2 ports.
• This vintage Microsoft mouse is being sold in untested condition. Physically, it is in great shape with no cracks in the housing, a clean cable, and an intact 9-pin serial connector. Please note the plastic has a natural "buttercream" yellowing/patina consistent with its age. Because I do not have the legacy hardware required to test it, it is being sold as-is for parts, repair, or as a collectible. Please see all photos for the exact physical condition.