Michel # 2474; Scott # 2307; Stanley Gibbons # 2455;
	The Mute Swan . Cygnus olor.
	Color: multicolored
	Date of Issue: 27.03.1976
	Face Value: 1 st
	Designer: L. Chehlarov
	Stamp Size: no information
	Stamp Quantity: 3 000 000
	Perforation: 11¾

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