People are social beings and show relationships to others in many ways such as dress, jewelry, language, or customs. A fun way to show membership in a group or service to a group is by specifically designed pins.
Pins can be used to reward for service, meeting a milestone, or just having the same goals as another. They can have historical significance and they can show changes in society.
Pins can be displayed discreetly on a lapel or collar or conspicuously with similar pins on a hat or vest. They are frequently traded at athletic, sport, or political events.
Update: NAACP pin has been sold.
Pins are great collectibles because they are generally inexpensive and can be themed by subject, composition, color, etc. But mostly they are interesting and fun!
Lions Club pin