unused 1899, ½p on 1p Blue, inverted overprint (25b, Gibbons 21a), o.g., h.r., centered to T., fine, Scott retail $1,000.00, Gibbons £800photo est.

Details
unused 1899, ½p on 1p Blue, inverted overprint (25b, Gibbons 21a), o.g., h.r., centered to T., fine, Scott retail $1,000.00, Gibbons £800photo est.