GB 1924 SG427wi Mint Wmk. Inverted, control block
Stock Code: P190012890
1924 9d Olive-green (Wmk. Block Cypher, Inverted). Very fine unused o.g. bottom left hand corner marginal A24 perf type 2(E) control block of six printed by Waterlow, bottom three stamps unmounted o.g. Scarce. Spec N43(1)a.
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