Details of a stamp in my main collection

CID1
StampRef19751
SetRef0
CStateMint
ItemID15129
CoverID
Quality
Description
CollectTypeMain Stamp
Comment
Location
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/15129.jpg or collection/15129.png

CID1
StampRef19751
SetRef0
CStateUS
ItemID15569
CoverID
Quality
Description
CollectTypeMain Stamp
Comment
Location
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/15569.jpg or collection/15569.png

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