A Letraset design by Michael Neugebauer (not his father Friedrich, as ITC incorrectly attributes it).
Berthold had it as Circulus (1972). Digitized by URW as Circle. See also KTF Cirk (2023).
Photo(s) by Buro Destruct on Flickr.
Contributed by Rob Hudson
Photo(s) by Henk Gianotten on Flickr.
Contributed by Garrison Martin
Contributed by Benjamin Brandt