Alameda County Postmark Collection. Approximately 390 covers and cards; most 20th century to modern, many better early postmarks with highlights including 1899 Golden Gate, 1860's Haywood manuscript, 1903 Haywards, 160 Oakland postmarks from 1889, 1887 Mills Seminary, 1888 Niles, 1880 San Leandro with negative SL cancel, 1880 Washington Corners; clear readable strikes throughout (no photo). Estimate  $200 - 300. $0