Irish millennium coin with different size and weight [gelöst]

I have one irish 1 pound millenium but with 2.658g and 20mm. Is it fake? Or a non register coin?

That sounds like a miniature, a smaller copy meant as a souvenir, not to be used as currency.

Please show pictures of the coin so that my guess can be confirmed.

Yeah, that’s a miniature. It’s a nice souvenir but probably has no significant value, maybe 1-3 euro.

Thanks for help