Bulgaria

Date1979, 02 III
Value4x 13 St
Catalog no.Mi 2754-2757, BL84   Y&T BF81A
TopicOSCE
Occasion
DescriptionSheetlet containing 4 stamps. On each stamp a decoration, composed of characters. On 3 stamps the word POKÓJ is visible, Polish for peace.
Overprinted sheetlet, first released on 1974, 29 X.
In the 3 cities, named on the frame, were meetings of the OSCE.