I was giving an example of low mintage UK coins where the dies were used to produce other Commonwealth/Countries coinage. This could be part of the reason why some coins are relatively few in number.
Which IOM coinage please John? The only fit I can see is the 1860 copper halfpenny and the 1839 IOM halfpenny and I'm struggling to get my head round that.
Apologies if this has already been posted, but e bay seller "The Coin King" has written an article about the increasing number of fakes being offered on e bay, including how they typically manifest, what to look for and where they might originate. Worth a read.
link