This is just an observation which I'll share in case it can be of any use to fellow Euro users.
The Argentinian peso is an exact colour inversion of the 1 euro coin, and is the same size. Its heads side has a very pretty drawing of the sun, the tails side is a normal shield. It also fits perfectly inside the [ of the Gibson euro Coin Unique allowing you to perform the traditional s&s with it.
http://www.easybuenosairescity.com/fotos/$1b.JPG
It's not ferromagnetic so you can use it under a [ for the Raven in quick transformations.
Chris