1995 BENGZON ERROR B/4 MINT. SCOTT #2371E

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5598919694 
 nigelgooding (UK)
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19.75
115.49
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Description: Scott #2371E. Scarce Cesar Bengzon error, which was soon replaced after realisation that the wrong portrait was applied to the stamp. Mint lightly hinged, does not detract from the front appearance of this elusive block. Scott 2002 Catalog Value - $150.00. Please Refer to Scan(s)
Comments: So many versions have been written on how this error came about and the events that transpired before and after the error was reported to the postal authorities. One thing is certain though, someone made a killing on this error.

Is it worth this much? Let me put it this way: slowly more of  the errors will come out that will probably reduce its catalog value.