They will not go on sale immediately because King Charles wants existing supplies of stamps adorning the late Queen to go out of stock first.
Why you can trust Sky NewsThe image of the King featured on first and second class stamps has been revealed as a simple profile image, showing his head and neck in the style of the late Queen, and all British monarchs since Queen Victoria.
The world's first stamp - known as the penny black - was issued in 1840 and bore Queen Victoria's image.
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