Guy:
The building depicted on the pin is the old Adams Meeting House or Oak Grove Church, founded in 1793. Here is a website with some history of the building:
http://nj.searchroots.com/Gloucesterco/oldstone.html
Note that the ending date on the pin is 1976. Bicentennial fever swept through Gloucester County like everywhere else in the United States, so there was no end of souvenirs and fundraisers available during that time period.
This is a nice keepsake and momento, so I hope you enjoy it for what it is: a silent witness of the historical hysteria that gripped everyone during the nation’s 200th anniversary.
Best regards,
Jerseyman