Two black outlined smiling faces separated by a red dotted line. The bottom two faces are neutral faced and smoking a cigarette and cigar respectively with smoke emitting from them. Red text and dotted line across the middle of the button.
This button promotes separate smoking sections in public places. It is from the Washington office of the Action on Smoking and Health. The office was founded in 1967 and started it's campaign for separate smoking and nonsmoking sections in 1971 amidst a national wave of support. Their campaign gained some support in 1971 when United Airlines was the first airline to create separate smoking sections.
Source: About ASH (2007). About action on smoking and health (ASH). Action on Smoking and Health.http://ash.org/allaboutash.html