I know this is a commemorative coin and some were plated in silver but i don't believe this one is as I have had it for some time and its color and tone look nice. also they were made 1989.
No, not a coin but a (privately made) medal. Comes up here every now and then; see these topics for example: http://www.cointalk.com/t158786/ http://www.cointalk.com/t37748/ Christian