Member ACCC (Australian Commonwealth Collectors Club of NSW) 03 May 2019 08:38:35pm
re: Missing Colour or Chemical Reaction?
Your stamp is known as a chemical changeling where the chemical bleaches the stamp. There may have been a light cancellation on the stamp but has since been removed by the bleaching. If placed under a microscope traces of what was the cancellation may be seen.
Rob
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"Specialised Collector of Australian Pre-Decimal & Decimal Stamps"
You are all correct it is chemical.
What does not show on the scan is that three of the dots in the top right hand corner are faintly yellow.
However it will still go into my Australia collection as an oddity.
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