Collection search - Canada Post Office Department collection [philatelic records] Official air mail first flight cachet

Philatelic material Cachet proof impression on card; first official air mail flight, Winnipeg, Manitoba to Pembina, North Dakota, (1931-02-02)..
Philatelic material Photographs of official commemorative cachets used on United States air mail first flight covers; Twin Cities (Fargo / Grand Forks) - Pembina, North Dakota extension (1931-02-02), together with explanatory letter from E.B. Wadsworth, Superintendent, Division of Air Mail Service, Post Office Department, Washington, D.C..
Formerly in accession 1989-565. Previously acquired by the National Postal Museum, accession number unknown..

Bibliographical reference: The American Air Mail (Society) Catalogue, 5th Edition, Volume 4, 1981, Canada no. 246. Also Volume 2, 1977 U.S. Contract Air Mail Routes, cachet nos. 9c, 9d, 9e. The accession file (1993-073 PHI) contains photocopies of these references.

Language of accompanying material: english.

Photocopies of photographs and proof impression are located in acquisition file.