The Keystone State - Pennsylvania

Pre-States: 1903 - 1905 City issued mostly porcelains

First Year of Issue: 1906

Undated Issues: 1965, 1977

Porcelains: 1906, 1907, 1908, 1909, 1910, 1911, 1912, 1913. 1914, 1915

Metal Tab Dates: 1943