This is a special section created purely for the 00p Colour Trial Machins. These are extremely rare. Dealers normally sell them anywhere from £120-£150. I have not found any dealer selling them for less than £100.
They were produced by De La Rue Security Print, the current primary printer of Machins. They were sent to other printers of Machins, including Joh. Enschedé of The Netherlands and Walsall Security Printers in the UK, for use in colour matching. It is used during printing by comparing these labels with the stamps coming off the press.
It is believed that up to 40 varieties of these stamps have been created between 1997 and 2007.
Some dealers sell these as "errors" - they are obviously not as they had a purpose in life. The only error is in their release to the general public. Quite how that happened I doubt we will ever know for sure.
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