That looks more like 1962 than 1982. But anyway, I'm a little confused by what you're trying to show in your photos. The front brake cable is intact, but the cable is not attached at the lever correctly. The right lever has nothing attached, but I see what looks like the cable housing (what you called sheath) in the second photo. Is it the right one that has parts broken and/or missing? You can buy an brake cable kit that will have all the parts you need, you just have to get one that has a ferrule that will mate with the lever on the handlebar. Something like this should work:
http://www.amazon.com/gp/product//B0...?ie=UTF8&psc=1 You can buy similar/identical cable kits at WalMart, Target, etc.