Pierce Mill, Baker Chocolate Postcards Pierce Mill, Baker Chocolate No. 582 Postcard. Caption on front: Pierce Mill, Dorchester, Mass. Postmarked Jul 10, 1911 Dorchester Center Station. With one-cent stamp. On verso: Hand colored. Published by Putnam Art Co., Dorchester, Mass. Facebook Twitter Print Friendly Skills Baker Chocolate, Dorchester, Lower Mills, Pierce Mill Posted on November 26, 2022 ← Pilgrim Church and Walter N. Baker’s Pharmacy Mattapan Square →