Genus species: Agaricus bisporus

Series: Mushrooms (Kenya 1989)
Catalog codes:
- Michel: KE 487
- Stamp Number: KE 497
- Yvert et Tellier: KE 479
- Stanley Gibbons KE 507
Emission: Commemorative
Perforation: comb 14¼
Printing: Offset lithography
Face value: 4.40Sh - Kenyan shilling

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