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Scott Number: R18c Collection Reference No. for Communications: 1366
Denomination/Type: 3c Proprietary, green, perforated
2020 Scott Catalog Value (for a single stamp): $ 9.00
Estimated Retail Value: $ 24.00 What is this?
Cancel Method: Undetermined
Cancel Color: Black
Cancel or Company Type: Other/Miscellaneous
Underlying circular revenue handstamp cancel, but then apparently reused illegally long out of period on a 20th century cover (larger cancel type appears to by a mid-20th century postal cancel).
If you have any information or comments about this cancel or stamp, please email me.