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Envelope
     
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SCOTT NO B273 SP208
DATE OF ISSUE 1958 Mai 31
FACE VALUE 10c + 10c
COUNTRY Switzerland
   
DESCRIPTION The stamp shows fluorite crystal. It is a very attractive mineral. It has a glassy luster. It turns flourescent in ultra violet light. It is used to produce a fluid slag in steel making & smelting ores. The surtax was charged for needy mothers.
   
VARIATION DESCRIPTION This envelope has stamps which depict fossils and minerals.
   
GEMSTONE Fluorite
VARIATION Meter Mark, Block, Souvenir Sheet, First Day Cover, Envelope