HONG KONG SG428w 1982 10 Dollar Variety wmk Crown to right U/M Plate Block

1982 10 dollars sepia and grey-brown wmk w14 (sideways) variety wmk Crown to right of CA lower left corner block of 6 (3×2) with large part imprint and 1C 1C 1C plate numbers unmounted o.g. Scarce positional multiple. Purchased from Stanley Gibbons (still on their card)