A single weight announced in Jul 1958 [Art Direction, Vol. 10, No. 4], with Bold following in Sep 1959 [Art Direction, Vol. 11, No. 6].
Contributed by Patrick Concannon
Contributed by Bryson Stohr
Photo(s) by Bart Solenthaler on Flickr.
Contributed by Florian Hardwig
Contributed by Florence Fu
Contributed by Annie Szafranski
Contributed by Stephen Coles