Best Goodwill find ever! 1926 Underwood Portable

I went to the big Seattle Goodwill store today, and found the best typewriter ever (and a Corsair):

 This typewriter was made in 1926, and was resold around the 1940s by the Washington Book Store (not to be confused with the University Book Store)

The dealer decal from the Washington Book Store, 4316 University Way (NE), applied after 1943.

The price tag that is on the case (I photographed to indicate that I really paid $15 for this typewriter)