Great Britain 1921 2s6d olive brown "Seahorses", SG413a var.
A superb unmounted mint, with full original gum, right hand marginal example overprinted 'CANCELLED" type 33. Printed by Bradbury Wilkinson.
GB Specialised Catalogue No: N65(1)zd.
Accompanied with a 2012 Royal Philatelic Society (RPS) Certificate of Authenticity.
