The buttons are mounted on a subway map introduced in 1979 and designed by Michael Hertz Associates. That map replaced the visually striking but much maligned 1972 design by Massimo Vignelli, who co-founded Unimark International. In the '60s Unimark created modern signage for the subway using Helvetica, to this day the official typeface of the MTA. Unfortunately, the MTA store no longer sells these buttons but they do have cufflinks that are similar. The ribbon on this card is from Hyman Hendler.