Cape of Good Hope 1877 Rare Colour Trial Used as Perf Trial

1877: COLOUR TRIAL IN PALE SALMON of the 1871-76 1d USED AS A PERFORATION TRIAL. Right marginal horizontal block of twelve on gummed Crown CC watermarked paper. This block is part of a pane of sixty which was attached to a card dated 29 SEP 1877 ex the De La Rue archives. VF, a rare rectangular period archival piece. (with copy photo-cert: Holcombe for similar).