Vintage I Took The Pepsi Challenge Soda Advertising Cola Metal Tab Pin Pinback

Vintage I Took The Pepsi Challenge Soda Advertising Cola Metal Tab Pin Pinback Does not appear to have been folded. Coin in the photo for size and not included. About the size of a golf ball. This includes the buttons in the photos. They show well and have normal wear from age and use. This is older, but not marked, so I am unsure of the age. The coin in the photos is not included and shown to display the size.