http://www.invaluable.com/auction-lot/1942-kgvi-5-d-brown-envelopes,-fine-m,-rs3-xxxx-1805-c-d4846efaaf1942 KGVI 5½d brown envelopes, fine M, RS3 (XXXX) - very few known, another used Norwood 1942 registered to Sussex. Scarce.
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