Great Britain 1915 10's Bright 'Cambridge' blue, SG411Great Britain 1915 10's Bright 'Cambridge' blue, SG411. A very fine used vertical pair printed by De La Rue. Other than a couple of blunt perforations at right lower stamp, very fine example of a very scarce and attractive multiple of this rare colour shade neatly cancelled by Jersey circular date stamps for MR. 15. 1917. A stunning exhibition piece with beautiful deep vibrant colour. The Stanley Gibbons catalogue price for a single used stamp is