Lecture (KF 00-15): Blue Mercury (1851) - Typology, postal use, and quality description

Lecture witin the regular cycle of lectures organized by the KF 00-15 Club of collectors of specialized areas in Prague (Czech Republic)

06. 05. 2021

Exhibitions of the Postal Museum

Specialized sections

Philatelic partners

POFIS - Postal philatelic service
EXPONET - Virtual international philatelic exhibition
Slovak Society of Olympic and Sports Collectors
Filaso.cz ...or philatelists for themselves
OLYMPSPORT - Czech Association for Olympic and Sport Philately
ZSF - Union of Slovak Philatelists