Some people might have seen this recently in the Sarawak Journal. These are flaws which were noticed last year. It is really surprising for such a relatively recent issue. I supposed there are quite a bit of a rush to print the omnibus issue for so many countries. These flaws should be similar for the other countries.
The most obvious flaw is the "lighter left eye" which should be present in all coronation stamps.
Note the "lighter left eye"
"freckle forehead"
"no lock of hair" close to left eye (the exception)
"pimple on chin"
"lock of hair"
"gash and pimple on chin"
"lock of hair"
"pimple on chin"
"tattoo on neck"
"mole above left eye"
"lock of hair"
"pimple on chin"
"lock of hair"
"no pimple on chin"