To be picky (besides clicky ;-)), that specific keyboard:

>Mmmm.... manufactured in 1985, just like Ars Features Editor Nathan Mattise.

was manufactured (on 28th August) 1992, and only copyrighted 1985.

Neither 1992 nor 1985 are "twenty years", for the record that is respectively 26 or 33, or more like around 30 years.

This said, you'll have to take my Model-M (and my HP28C pocket calculator) out of my cold, dead hands, it is good to see that some of the younger folks still appreciate the reliability and sturdiness just like some of us old dinosaurs still do.

Long life Model M!