I'm amused -- I was just in a friendly argument at work about the Model M (and related styles) vs. my personal favorite, the Microsoft Natural Pro. My keyboard isn't *quite* as old as yours, but I think I've carried this one through six jobs over twelve years now. (I own four Naturals, but I'm still partial to the original, before they started adding all the specialized keys.)

An interesting variant of the old Mac-vs-PC debate...