Pre Euro Coins

Yes, most countries issued silver coinage of some kind, normally only their "flagship coins", but the date they switched from silver to base-metal varied from country to country. Germany, for instance, didn't abandon it's silver 5 mark coin until 1974.

Belgium: didn't issue too much silver; the only ones post-WWII was the 20, 50 and 100 francs 1949-1960.

France: not much, besides the 5 francs 1960-1969.

Italy: The 500 lire remained silver until the lire was replaced with the euro, but wasn't issued for circulation after 1970.

Switzerland: your best bet to find post-WWII European silver in change: the ½, 1 and 2 francs up to 1967, the 5 francs up to 1969.

I seem to remember that France also issued in the 1970's and 1980's 10, 50 and 100 franc coins in silver that were in general circulation

Sap

I had a cousin that had a number of market stalls in Lille and he would fill a jar with all the silver coins that he received at the market. I still have a number of them that he gave me at the time.