I got my '93 Model M out of a dumpster.

The white box on top of it is a Bluetooth Adapter - Handheld Scientific, and it works great if you want to use an IBM Model M with an iPad or other bluetooth device.

I mostly use this keyboard with my iPad. As you can see, it's in need of a good bath. When I get around to cleaning it, I'll replace this paragraph with a link to how to clean an IBM model M.

This one is one of the newer model M's made by Lexmark, and has the one-piece keycaps.

Specs:

Layout: 101 key

Label: blue IBM logo

Cord: detachable

Keyboard Number: 1370477

ID Number: 5009085

Manufactured date: 06/04/1993