left: Absolutely Free by Theo van den Boogaard (1967).
right: Blowin’ Your Mind by Willem de Ridder (1967).
A couple of samples from similar work scattered around a Dutch auction site, along with more familiar designs from the San Francisco and London artists. All the Dutch examples are new to me; the dominance of the American and British designers of the period tends to marginalise the work of artists from Continental Europe even though Dutch design group The Fool was very prominent for a while due to The Beatles’ patronage.
Previously on { feuilleton }
• Family Dog postcards