It's no wonder the pros didn't care for the metal sticks of the late 60s and early 70s. Most of the aluminum frames were riveted instead of welded and they rattled and twisted like an old Studebaker. My Smasher of the day only had two spacer/rivets in the handle...didn't take long for those to fail.
The Chemold aluminum has to go down as one the the absolute worst rackets ever used by a top player. The steel T2000 was a Rolls Royce by comparison. When the welds in the metal frames held up, and some were pretty darned good and have lasted all these years(Wilson T series, YY 7500/8500, et al). They weren't really bad rackets but until the Zylon-type throats came on the scene to cut down on vibration and breakage, the riveted models just didn't play worth a nickel.
Before the foam-injected handles became popular, there were a few metal frames with wood handles. The early Yoneyama/Yonex models as well as a chromed model from Slazenger. You could probably jack up a car with those things!
The Seamless/Seamco model used by Rosewall(and one of our USC-the original- team players) had a lousy handle system, as well; but, the hairpin was one piece. The 'nylon' throat and string suspension system worked well until the racket had a few miles on it...then the squeaks and rattles started. Wasn't the easiest thing to string either.
I now hit more with my Red Head Pro and YY8500 than with any of my current sticks. If you find the middle, they work! I had a group of kids gawking at me last week when I busted a couple of serves with an mid-70s T2000(with original International nylon). Fun!
Ah, the good old days!!!