They are of the era, My best guess would be '68-'69 based on the neon color choices.
Printed on heavy stock paper and are showing some age.
Sort of in line with those psychedelic Judge posters.
I have a few and as mentioned there are no markings/dates.
They are along the line of the similar signage that was usually hung from the showroom ceilings.
__________________
When I die, I want to go peacefully like my grandfather did, in his sleep.
Not screaming like the passengers in his car.
