Genus species: Macrolepiota procera

Series: Mushrooms I (Bulgaria 1961)
Catalog codes:
- Michel: BG 1268
- Stamp Number: BG 1188
- Yvert et Tellier: BG 1104
- Stanley Gibbons: BG 1279
Emission: Commemorative
Perforation: comb comb 12¾ x 12½
Printing: Offset lithography
Colors: Multicolor
Print run: 300,000
Face value: 80 ст - Bulgarian stotinka

Reference: Colnect.com
Shop now link: ebay.com (note: market availability)