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B-371%u2014%u2014September 20, 1929%u2014%u2014Princeton%u2014%u2014Princeton Airport%u2014%u2014Unknown number of pieces cancelled.On reverse, the printed notation, %u201cThis is a LUXWOOD AIR MAIL ENVELOPE. Approved by the U.S. Post Office Department for AIR MAIL only. Use for other purposes not permitted.%u201d No backstampPrinceton Daily Clarion, September 21, 1929.
