Here is a complete sheet of 4 airmail labels from Guyana. It looks like it comes from booklets.
Guyana officially the Co-operative Republic of Guyana, previously the colony of British Guiana, is a sovereign state on the northern coast of South America that is culturally part of the Anglophone Caribbean. Guyana was a former colony of the Dutch and (for over 200 years) of the British.(wikipedia)
Year: 1987, Ungummed. Günter Mair's catalogue no: - GUY-A-1, rouletted, sheets of 4(2x2),
light blue/white, 2**