Franz Kalckhoff

Dr. Franz Kalckhoff (1860-yil 30-noyabr – 1955-yil 13-fevral) – nemis filatelisti. U 1934-yilda Taniqli filatelistlar ro‘yxatini imzolaganBackground notes on The Roll of Distinguished Philatelists September 2011, Roll of Distinguished Philatelists Trust, London, 2011. Archived here..

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