Today I received this 1970 240z silver bar, in the mail, that I won on ebay last week.
It weighs 1000 grains (64.8 grams), is made of sterling silver and comes from the Franklin Mint. It's supposed to be part of the "100 Set Centennial Car Ingot Collection" and was issued 1973-1978, according to the seller.
This is an awesome bar and even though mine is a '72, I was lucky enough to find it by chance and win it!