The 1991 Nevis Sc #664 s/s Birds is a Souvenir Sheet featuring various bird species in a Multi-Color design. This particular stamp has been used with Bullseye/SOTN cancellations, adding to its collectible value. Uncertified and originating from Saint Kitts and Nevis, this stamp is a unique and sought-after piece for bird enthusiasts and stamp collectors alike. With an estimated catalog value of $16.00, this souvenir sheet offers a glimpse into the animal kingdom and is a valuable addition to any postage stamp collection.