Details of a stamp in my main collection

CID1
StampRef3899
SetRef0
CStateMint
ItemID6458
CoverID
QualityFine
Descriptionhorizontal pair
CollectTypeMain Stamp
Comment
Location
Multiplicity2
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/6458.jpg or collection/6458.png

CID1
StampRef3899
SetRef0
CStateUS
ItemID9268
CoverID
Quality
Description
CollectTypeMain Stamp
Comment
Location
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/9268.jpg or collection/9268.png

2 different examples of this stamp were found in the collection.