Solomon Islands Circle

Series

The stamp is part of a series named 30th Anniversary of the First Moon-Landing. The other stamps in the series are all rectangular.

References

Colnect / 30th Anniversary of First Manned Moon Landing / https://colnect.com/en/stamps/list/country/195-Solomon_Islands/series/177259-30th_Anniversary_of_First_Manned_Moon_Landing

Phil India International / Solomon Islands 1999 1st Manned Moon Landing Space Sc 879 Odd Shape M/s MNH # 12882 / https://www.philindiastamps.com/en-au/collections/odd-shaped-exotic-stamps/products/solomon-islands-1999-1st-manned-moon-landing-space-sc-879-odd-shape-m-s-mnh-128