Allegheny City Trade Cards 1860-1906 Trade cards were used as advertisements and sometimes money from around 1860-1910’s. These trade cards were circulated in Allegheny City which is now Pittsburgh’s Northside. These cards were provided by Bob Blackham. Become a Donor Your generosity will help the Allegheny City Historic Gallery to continue to preserve and promote Northside / Allegheny History and connect old friends and neighbors. Any amount is greatly appreciated.