“Omar Rayo en la Segunda Bienal Americana de Artes Graficas / Museo La Terulia / Cali Colombia, Octubre 1973.” Stripes (1973) is paired with Pump Bold (1970), which is used without i dots.
Omar Rayo (1928–2010) was an abstract art painter from Colombia whose geometric Op Art works have been exhibited multiple times at Museo La Tertulia and at Museo Rayo in Cali. The two museums collaborated on a retrospective exhibition with paintings from both collections. Each time a catalogue was printed it featured a different typeface arrangement, mostly with geometric display typefaces. Both museums even made an special exhibition in 1977 called Los Rayos del Museo Rayo y los Rayos del Museo La Tertulia.
Some exhibition catalogues like the one for La constante geometría from 1972 had original lettering, but most of the covers and posters are early examples of instant lettering typefaces in use, with very original typesettings. Unfortunately I couldn’t find any information about the designer of these printed materials.
Another exhibition from 1985 called Rayo Serie Raya Blanca Raya Negra shows Stripes in use. In Spanish, Omar’s family name Rayo could be translated to “ray”, but when used in feminine form, Raya means “stripe”. In this case, it transtales to: Rayo White Stripe and Black Stripe Series.
Stop (1971) and caps from an unidentified wide grotesk (similar to Akzidenz-Grotesk or Venus breit) for Omar Rayo at the Museu de Arte Moderna de São Paulo.
Poster for Rayo Serie Raya Blanca Raya Negra (1985), featuring Stripes and Helvetica. The Museo Rayo logo at the bottom left is based on @typeentity:1143@, while the text at the right is set in caps from Wexford.
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Poster for La Constante Geometria (1972), ft. more ITC Ronda and Univers Ultra Condensed or similar. The big “OMAR RAYO” is probaby custom. For similar extracompressed digital fonts, see Radiator or Fit Skyline.