Information regarding event cancellation from Event cancellation from PRAHA 1

Postal office:	PRAHA 1
Cancellation color:	BLUE
Text on the stamp (first upper line):	PRAHA 1 ** b
Text on the stamp (second upper line):
Text on the stamp (first lower line):	1897-1937
Text on the stamp (second lower line):	OSLAVY 40.LETÉHO TRVÁNÍ ČSL. STRANY NÁR.SOCIALISTICKÉ
Text translation:	CELEBRATIONS OF THE 40TH YEAR DURATION OF ČSL. SOCIALIST PARTIES
Comment:
Offical period of usage:	1937-05-16

Dates the stamp is used
1937-05-16	Letter Cutting

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