German Verse Coins

We have found four silver and three bronze coins, perhaps from a series of four.  Just over 1" in diameter.  German verse on the verso fitting the fable and even the phase of the fable in the case of FS.  We know the source of only one.  Several came in a small chest with two drawers under the cover, each drawer with slots for two coins. 

One has to wonder about the occasion for creating or giving these coins.  Celebrations of some sort?  I am tempted--but afraid--to clean and polish up this old coin.