Spacecraft flies around Globe, National Coat of Arms of both

Stamp from souvenir sheet.
Joint issue - Bulgaria and USSR.
USSR Mi:SU 4837-4838.
NOTE - The Bulgarian stamps are of a totally different design to the USSR stamps.

Country:	Bulgaria
Type:	Postage stamps
Series:	Soviet-Bulgarian Space Flight - Soyuz 33
Nominal:	1 лв
Year:	1979
Perforation:	comb 13