deskthority

Here's a teardown of a Mouse Systems mouse. The electronics are completely different, but otherwise the inside looks much the same, with some mechanical differences.

http://kuzyatech.com/optical-mouse-the-old-way

More findings: 1981 invention of the optical mouse, and a 1982 mouse with a female connector.
From: https://www.gearrate.com/en/mouse/history/

I found another Mouse Systems model, still different positioning for the apertures:

Yeah, they seem a lot alike! Looks like a similar optical mechanism, and the bottom is laid out almost identically. So is the slope. There's a longer sticker on the top with the IBM logo, the buttons are boxier, and it's textured like the older PC/XT/AT.

I do think it's serial, but female instead ...

Ran across this on Friday in a recycling center, tangled up with some serial mice. I can't find any reference to this mouse on Google Images or the web, or its 9-pin female connector.

6B4D10E0-C7ED-43FC-8094-CEE95E5D8C1C.jpeg
1BFAC405-0EA3-4DE1-87CD-F070344EC030.jpeg
88AE0B0B-516B-44F7-A540 ...

Oh, nice! That would be cool either way, how much do you think shipping would be? Where are you gonna be in the US?

First post!
I bought my first Model F for $99 about a little over a year and a half ago. It needed a lot of care and restoration. The keyboard worked, but wouldn't type odd numbers at the top. It looked like the corresponding trace was broken on the PCB. I tried fixing it myself, but it wouldn't ...