It is late and I'm sort of deteriorating! Disregard my first post. What I have (I'll try to get it right this time) is a 1967 90% silver Kennedy HALF DOLLAR. :goofer:
Yep, they are only 40% silver (not 90%... '64 was the last year for those), so melt runs about $1.75 to $2.00. That's about it.
Here's a GREAT calculator that will show you exactly what you're looking for. http://www.coinflation.com/coins/silver_coin_calculator.html For the record, there is only one year when the Kennedy was 90$, that's 1964. '65 to '70 were 40%, and '71 on have all been clad.