Details of a stamp in my main collection

CID1
StampRef16538
SetRef0
CStateMNH
ItemID15061
CoverID
Qualityfine
DescriptionCentred slightly high and right. Slightly rounded corner SW.
CollectTypeMain Stamp
CommentHorizontally lined paper. Item 9.3 of purchase 3733.
Location6
Multiplicity1
PurchaseID3733
PricePaid6.11
CurrencyGBP
Accession20230927
Disposed

There is one example of this stamp in the collection.