Michel # 643; Scott # 618; Stanley Gibbons # 767; Yvert # 632;
	The West African Helmet . Cassis tessellata.
	Color: multicolored
	Date of Issue: 15.06.1981
	Face Value: 1.50 E
	Designer: no information
	Stamp Size: 37 × 25 mm.
	Stamp Quantity: 500 000
	Perforation: 12:12½

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