Details of a stamp in my main collection

CID1
StampRef16954
SetRef0
CStateUS
ItemID14872
CoverID
Qualityfine
Descriptionblock of 4, cancelled SHANGHAI 7 9 46, well centred, creased down central vert. perfs
CollectTypeMain Stamp
Commenttype A dot under collar (easier to see with a magnified image) appears just above and between the '1' and '0' of the surcharge; stamp 19.7 x 22.5 = wide. Note projection of outer box of 'er' on lower right stamp
Location7
Multiplicity4
PurchaseID3702
PricePaid1.52
CurrencyGBP
Accession20230821
Disposed

No image found for collection/14872.jpg or collection/14872.png

There is one example of this stamp in the collection.