unused  -- 7½a. mauve and red showing variety "Bri" for "British", with the relief mark of a pin where the missing letters should be, fresh unused with large part original gum. Extremely rare. B.P.A. Certificate (1990). S.G. 85a, £1200. Photo
unused -- 7½a. mauve and red showing variety "Bri" for "British", with the relief mark of a pin where the missing letters should be, fresh unused with large part original gum. Extremely rare. B.P.A. Certificate (1990). S.G. 85a, £1200. Photo

Details
unused -- 7½a. mauve and red showing variety "Bri" for "British", with the relief mark of a pin where the missing letters should be, fresh unused with large part original gum. Extremely rare. B.P.A. Certificate (1990). S.G. 85a, £1200. Photo
Further details
Note: It would appear that an obstruction intervened between the type and the stamp, possibly a piece of paper which became detached from the make-ready.