Definitely not the world's first. I think France may be the first country to have circulating tri-metal coins. Don't know about other countries to be honest but there have been other countries that produced tri-metal coins, usually in precious metal content. Australia is one of them. Think Isle of Man could be another but I could be wrong.
My partial coin collection http://www.omnicoin.com/collection/gxseries
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
Regularly updated at least once a month.
My numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htm
Regularly updated at least once a month.




















