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Description:	Bulgarian scientists: 125th birth anniversaries of Acad. Nikola Obreshkov and Acad. Georgi Nadjakov
Date of issue:	16.12.2021
Denomination:	0.65 & 1.00 Leva
Quantity:	5500
Stamp size:	54 x 29 mm
Perforation:	13 1/4 : 13
Sheets:	5 x 8
Printing process:	offset / digital
Designer:	Stoyan Dechev
Cover (stationery):	No
FDC:	No