British Caribbean Territories 1965 10c--Counterfeit

Admittedly, I'm a newbie too on the subject of counterfeits Perhaps a low-denomination counterfeit wouldn't be scrutinized?
The authentic coin is cupronickel, not cast/plated--so I'm only guessing a fake, but what other explanation is there?
It's in Krause under "East Caribbean States", and this is KM#5 (if real).

hmm, well that one certainly is fake, and the real one is only worth 35 cents when BU. So I am not quite sure why someone would have gone to the trouble of making this. I can only assume that it was done in order to pass it off in circulation. I actually have a British Indian Rupee that is similarly cast (badly), but the real version of it should have been silver, and today the value is way over 35 cents.

All in all, your fake is pretty cool.

I learned something from your discussions. Thanks.