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SCOTT NO 433 A92
DATE OF ISSUE 1979 Nov 26
FACE VALUE 4c
COUNTRY South West Africa
   
DESCRIPTION The stamp shows topaz. Its name is derived from an island in the red sea. The coloring agent is iron & chromium. Care must be taken during polishing & setting because of the danger of cleavage. It is not resistant to hot sulphuric acid.
   
   
GEMSTONE Topaz
VARIATION Meter Mark, Block, First Day Cover, Envelope