R.P.O. covers, 1811-1917. 3 covers and 4 cards; 1910 Jamestown & Miles City 2-line date stamp in purple, purple 912 Biggs & Shaniko/ Sub. 3-line date stamp, 1881 Kan City & Pueblo cds and large W killer, scarce 01900 San. Fran. & Lompoc R.P.O. - S.R postmark (rail & steam river, unlisted), 1910 S.L.O. (San Luis Obispo) & Los Olivos duplex postmark, 1900 Seattle & Union and 1917 Tol. & St. Louis cds and duplex on illustrated farm implement ad cover; couple with a few minor faults, otherwise Very Fine. Estimate  $300 - 400. $0 (Image)