Details of a stamp in my main collection

CID1
StampRef19750
SetRef0
CStateMint
ItemID15128
CoverID
Quality
Description
CollectTypeMain Stamp
Comment
Location
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/15128.jpg or collection/15128.png

CID1
StampRef19750
SetRef0
CStateUS
ItemID15568
CoverID
Quality
Description
CollectTypeMain Stamp
Comment
Location
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/15568.jpg or collection/15568.png

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