Details
used 4d. sage-green, abnormal plate 17 (watermark upright), IG, a wing-marginal example with indistinct numeral cancellation; central pinhole, some perfs. missing and corner rounded at top-left, otherwise fine. Rare. B.P.A. Certificate (1989). S.G. Spec. J66, £6000. Photo
Further details
Note: Only twenty-three examples of this abnormal are recorded, two of which are in institutional collections