Historic Post Office in Dublin, PA. The building served as a Post Office in Dublin Borough in 1923-1975. In 1923, Jacob M. Kooker became postmaster and re-located the post office to his general store. Kooker retired in 1944; the post office remained at this site until 1975. The building is located on the corner of Main St and Maple Ave. It is Bond Bread bakery now.