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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.
   
   
GEMSTONE Fluorite
VARIATION Meter Mark, Block, Souvenir Sheet, First Day Cover, Envelope