Lot 95972 – Philately: 1877-1920, 15 advertising covers of philatelic traders

Philately: 1877-1920, 15 advertising covers of philatelic traders incl. beautiful registered cover of Sigmund Friedl 1877 with his label on backside, Champion cover 1918 with censor and a rare private imprint on NL-envelope with beautiful backside « Philatelistische Boekhandel ». A very nice ensemble of early philately and a beautiful collecting field for the advanced philatelist!