Lot 407
Netherlands flight covers, beautiful mounted collection of about 60 airmail covers and 16 aerograms, 1920-1954, nearly all cacheted flight covers including 11 Zeppelin covers, a Do.-X and a catapult; also includes 12 different airpost labels, 1920-39, and six early KLM labels and seals.
Estimate 3,000 - 4,000
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