Details of a stamp in my main collection

CID1
StampRef837
SetRef0
CStateMint
ItemID2814
CoverID
Quality
Description
CollectTypeMain Stamp
Comment
Location
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/2814.jpg or collection/2814.png

CID1
StampRef837
SetRef0
CStateUS
ItemID15099
CoverID
Qualityfine
DescriptionGood perfs, well centred, KUNMING 30 4.40 cds (early use)
CollectTypeMain Stamp
CommentWidth 40.8 mm. Somewhat unusual use of CE format date instead of 29th year of Republic.
Location6
Multiplicity1
PurchaseID0
PricePaid0
CurrencyGBP
Accession
Disposed

No image found for collection/15099.jpg or collection/15099.png

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