1 of 3 Kown Sets!  C27-31 with Mauritania UPU Specimen Overprint.  A great Rarity with the set that was issued for and used for flights in and out of Hawaii.  RARE!

 

 

21_88_Specimen(C)              4/17/20

 

 

21-88 1 of 3 sets C27-31 Specimen

$500.00Price

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