POSTAGE DUES: 1947 IMPERF COLOUR PROOF SHEET for 1d carmine (SG D1 design). A complete imperforate plate proof pane of 60 on gummed watermarked paper handstamped in red at base "CONTROL COLOUR SHEET" with manuscript endorsements "OK, initials 16.7.47". A wonderful archival piece, probably the sole surviving such example. Rare & exceptional.
