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SCOTT NO 311 A50
DATE OF ISSUE 1986 Mai 22
FACE VALUE 2sh
COUNTRY Tanzania
   
DESCRIPTION The stamp shows sapphire gemstone. The coloring agent is iron & titanium. In artificial light it appears as ink colored. It is widely used in diamond jewelry.
   
VARIATION DESCRIPTION It is an ordinary airmail envelope with routine cancellation.
   
GEMSTONE Sapphire
VARIATION Block, First Day Cover, Envelope