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).
Contributed by Benjamin Brandt
Photo(s) by Henk Gianotten on Flickr.
Contributed by Rob Hudson
Photo(s) by Buro Destruct on Flickr.
Contributed by Garrison Martin