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

Angola 1999 Great People of the 20th Century - Albert Einstein sheetlet of 4 (2 tete-beche pairs with the John Glenn in margin) the set of 5 imperf progressive colour proofs comprising various colour combinations incl all 4 colours, a very scarce assembly unmounted mint