Rare Vintage Early 1970s Pin Back Button By Dalo Button Co NYC “EARTH DAY”. For Sale

Vintage round pinback button with a yellow border and a central square divided diagonally into a blue-green top triangle and a bright green bottom triangle.

This pinback button is approximately 50 to 55 years old, dating back to the early 1970s.

It was manufactured by the Dalo Button Co. as a piece of promotional merchandise for the Eco-Alliance student organization, a collegiate environmental group heavily active around the time of the inaugural Earth Day in 1970.

Great condition minor imperfections due to age and use. 1. 1/2” D