Many thanks for all your guesses; you've made this find even more exciting than it already is! Richard's and Miguel's answers were the closest. How about a post on your favorite standard typewriter?
Cara McCarty, "Industrial Design" in Mario Bellini: Designer. New York: MOMA, 1987.
* See also Olivetti Lexikon 80 at the MOMA permanent collection; and Richard Polt's Lexikon 80.
* Typecast via Olivetti Lexikon 80