Details of a stamp in my main collection

CID1
StampRef19766
SetRef0
CStateMH
ItemID15133
CoverID
Qualityfine
DescriptionIMPERF BETWEEN vertical pair. Unlisted. Well centred, slightly high and right. Rough perf 12½.
CollectTypeMain Stamp
CommentPaper seems to be Chan type E, Ma VI, glazed paper. Smooth both sides, evenly opaque, slightly yellowish. Measures 0.0040" - very thick for this paper. Faint small tone spots top left.
Location6
Multiplicity1
PurchaseID3868
PricePaid79.68
CurrencyGBP
Accession20240226
Disposed

There is one example of this stamp in the collection.