Falkland Islands 1938-50 5s indigo and pale yellow-brown, "Southern Sea Lion", SG161b, 1938 second printing, upper marginal BLOCK OF 4 (folded horizontal perforations).
A fresh unmounted mint positional block with full original gum. The lower right stamp with small corner crease (barely detectable), but a rarity in this form and condition.
A beautiful multiple of this popular King George VI stamp issue in a rare colour variety.
Accompanied with a 2018 British Philatelic Association (BPA) certificate of authenticity.
The Stanley Gibbons catalogue value is £4,400+.
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