Information regarding event cancellation from Event cancellation from PRAHA 1

Postal office:	PRAHA 1
Cancellation color:	BLACK
Text on the stamp (first upper line):	I.MEZINÁRODNÍ SJEZD OBCHODNÍKŮ
Text on the stamp (second upper line):	POŠT.ZNÁMKAMI
Text on the stamp (first lower line):	Č.S.P.
Text on the stamp (second lower line):	PRAHA 1 **
Text translation:	I. INTERNATIONAL CONGRESS OF TRADERS OF POSTAGE STAMPS
Comment:
Offical period of usage:	1922-09-02,1922-09-22,1922-10-31

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