c. 1959 or 1960.
1968. Design/Don Schlitten.
1968.
1962. Design: Murray Stein.
1966.
c. 1960.
1964. (Thanks to Stuart Murray for the tip on this one.)
1958. Design by Esmond Edwards.
I applaud the effort—especially for 1969—but it doesn’t quite work on a couple of those letters. I like the “a” quite a bit, though. Kind of Aphex Twin.