Critical Mass: 10 Years
Late 20th Early 21st Century
18.125 in HIGH x 24 in WIDE
(46.04 cm HIGH x 60.96 cm WIDE)
All Of Us Or None Archive. Gift of the Rossman Family.

Red "B" maker''s mark printed at the bottom right.

Poster has white unprinted edges enclosing a red, black and purple background with yellow swirls. At the top is "Critical Mass" in white. At the center is a stylized image of a bicycle, with the front wheel forming the zero in "10 years". The one is made by a stylized image of one of the towers of the Golden Gate Bridge. At the bottom left and right is "Riding Daily" and "Celebrating Monthly".
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