Artist Tyree Callahan hacked into a Underwood Standard typewriter from 1937 to create this absolutely amazing piece, dubbed the Chromatic Typewriter. The "typebars" are replaced with ink pads, and the keys given a corresponding color. From the duo of tones on each key, it looks like the artist even preserved the "shift" option.
As a scultpture, it's plenty striking, but the piece actually works to create original "paintings" by typing on the keys:
Did I mention how much I love this? Cause I do. I'll certainly be on the lookout for a vintage, hackable typewriter.