Both before and after the second world war Norwegian money (the coins) where made of copper. (Or to be precise copper + pewter = bronze). They were marked H7 on one side which stood for Haakon 7th (the king of Norway).
However, the Germans decided that the copper was to be used for making weapons instead and new coins were made, called "occupation coins" where the H7 was substituted with the lion which is Norways' coat of arms. The coins with the lowest value were made of iron (the coins you can see on the pictures here) and coins with slightly higher value was made of zinc. (The really small change that is...)
Other coins were in fact substituted with paper money.
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Mimregubben
