Its a coin. The ECU (European Currency Unit) was proposed, but never went into circulation. Europe (and note we Brits like to say we are not part of Europe <g>) got the Euro instead!
I wouldn't call it a coin : the ecu never was an official currency. I'd say it's a token : maybe it was possible to use it during a short period and in a limited area.
There is also no indication of issuing country, so you don't know where to turn it in.
Oh its a strange one. To me a token is intended to be used, a coin is money, the ECU was proposed but never circulated. But its not what I should describe as "fantasy" either, its not like some imaginary coin produced by a private mint solely for collectors. Rather, like Edward VIII coins in Britain, it is a coin, but never went into official circulation (it was used in travellers cheques and financial transactions howver) being instead replaced by the Euro which bears striking similarities.
Matt
PS
Amd yes ecu was also the name of an old French coin. Coincidence? Probably not!
To me, coins and tokens are separated by two things:
1) A coin is minted by, or on behalf of, a government. Tokens are not.
2) A coin has, or once had, legal tender status by the government that issued it. Tokens never do.
is this a coin or token??? 
is this a coin or token???
