Lot 2422
[United States] National Philatelic Museum, National Philatelic Museum of Philadelphia, 1948-57, run of 35 issues less only one for completion, included are scholarly studies by distinguished philatelists such as Chase, Ashbrook, Brazer, Lidman, Ward and Bruns. An enormously interesting series, and superb reference source for US and world philately, F.-V.F.Estimate $400 - 600.