Details of a stamp in my main collection

CID1
StampRef1146
SetRef0
CStateMNH
ItemID15032
CoverID
Qualityfine
DescriptionPerf 10½. Centred left and low. Additional unlisted var - 改 gǎi and 作zuò raised about 1mm.
CollectTypeMain Stamp
Commentirregular horizontal lines on back
Location6
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

There is one example of this stamp in the collection.