Conchophilately Collecting Stamps on Shells Algeria - People's Democratic Republic (1997) Sr No Country Species Face value Type Year 1 Algeria Hinia reticulata 3 cents Stamp 1997 2 Algeria Chlamys varia 5 cents Stamp 1997 3 Algeria Bollinus brandaris 35 cents Stamp 1997 Antigua - Former Caribbean British overseas territory (1973) Sr No Country Species Face value Type Year 1 Antigua Cypraecassis testiculus (Reticulated cowrie helmet) 3 cents Stamp 1973 2 Antigua Macrocypraea zebra (Measled cowrie) 5 cents Stamp 1973 3 Antigua