South West Africa 1943-44 War Effort 1s brown error, SG130c

South West Africa 1943-44 War Effort "Tank Corps" 1s brown (reduced size), type 31 overprint, vertical pair, error OVERPRINT INVERTED, SG130c.

A fine used example with large part "Windhoek Counter" circular date stamp, dated '16 X 44'.

A very scarce stamp error.

Accompanied with a British Philatelic Association (BPA) certificate of authenticity (2016).

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