Information regarding event cancellation from Event cancellation from PRAHA 31

Postal office:	PRAHA 31
Cancellation color:	BLUE
Text on the stamp (first upper line):	PRAHA 31 **
Text on the stamp (second upper line):
Text on the stamp (first lower line):
Text on the stamp (second lower line):	CELOSTÁTNÍ SJEZD UČITELŮ PRAKTIKŮ
Text translation:	NATIONAL CONGRESS OF PRACTITIONER TEACHERS
Comment:
Offical period of usage:	1936-06-28/1936-06-29

Dates the stamp is used
1936-06-29	Letter Cutting

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