The 1855 coin - it should be a bit of a large one - could possibly fetch a pretty penny. One Speciedaler of Norway. If it isn't polished and authentic (not sure about the polished part), it could indeed be worth something. Although I'm terrible at estimating these coins, I know that older Norwegian coins tend to be rather expensive. £100 to £500 or more? It looks to be in very good condition, with very little wear, so hopefully it is indeed not polished, damaged or counterfeit in any way.
A quick look didn't result in any reference prices, but
CoinQuest might be helpful.