I'm into old Swiss Silver coins. I do buy them on the melt value, but there are a lot of them that are colecctionables. Switzerland stopped to use Silver in 1967. Coins from 1/2 Francs, 1 Fr. 2 Fr. and 5 Fr. before '67 where all at least 875 Silver, the older ones up to 900 Silver. My way to look at it = the smaller the value, the easier it is to barter in a emergency situation. For ex. nobody will want to accept your 1 Kilo Bar, if you want to buy some groceries.