GB 1966 SG696ab Mint black, blue, bistre & reddish brown omitted
Stock Code: G1671741
1966 4d British birds (Ordinary paper). Superb unmounted o.g. block of four with black, blue, bistre and reddish brown omitted. Folded through vertical perforations, nevertheless a wonderful example of undoubtedly the most spectacular QEII error. Offered with normal block for comparison. Cat £20,000.
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