Isle of Mann one crown coin

I have a 1990 Isle of Man one crown "alley cat" coin.   39 mm diameter, 28.5 g weight. I measured the density, and it is 9.0 g/mm^3. Can not identify metal, thought it was silver but could not be at that density?

Would appreciate knowing what the metal is and is the coin worth anything.

Thank you.

N#32673

Copper Nickel

Uncirculated you might get 5 to 10 pounds for it.

Mike

Thank you. 

Yes, CuNi definitly.

Silver version of this cat series has written “Ag 1 oz” above the denomiation  “CROWN”.