Lot 944
 
Envelope, 1874, 7¢ vermilion on amber (U186 var.), mint size 7, knife 28 entire, couple small, very faint tone spots, mentioned only for strict accuracy, otherwise fresh and Very Fine. An exceedingly rare knife variety. Only six mint examples recorded. UPSS 537-2 $2,000,
Expertization: signed Marcus White with "4th copy known to me".
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