Identification

Any opinion about these 3?

German one is magnetic 

Dutch one seems not to be bronze

Spanish seems to be ???? plated aluminum 

Thank you in advance 

German one is this: N#854  It's been plated post mint maybe silver.

Spanish one is this: N#1267 Again plated post mint, maybe gold.

Dutch one is this: N#2584 It too has been plated post mint, maybe silver. Probably plated a while ago.  You can see the reddish color of the bronze underneath where the plating has worn thin.

You have three science projects or hobby coins.