Angola 1999 Great People of the 20th Century - Albert Einstein (portrait) sheetlet of 4 (2 tete-beche pairs with the Bill Gates in margin) - the set of 5 imperf progressive proofs comprising various 2-colour combinations plus all ……Details Below

Angola 1999 Great People of the 20th Century - Albert Einstein (portrait) sheetlet of 4 (2 tete-beche pairs with the Bill Gates in margin) - the set of 5 imperf progressive proofs comprising various 2-colour combinations plus all 4-colour composite, unmounted mint