Washington-based painter Tyree Callahan modified a 1937 Underwood Standard typewriter, replacing the letters and keys with color pads and hued labels to create a functional “painting” device called the Chromatic Typewriter. That's awesome!
"This is my favorite typewriter in my collection, the keys drop from the side alternating. Very unique, before we got "set" into our idea of how a typewriter should work." I don't have the typewriter but I love the photo.