Norton Ranger P11. LOVELY bike.
He bought a Commando while in England filming Where Eagles Dare.
You can see Clint ride it at the end of Superstar Profile, a 1978 French-English Documentary.
VERY similar to this one -Triumph
use Eastwoods name quite a lot in the promotion of their bikes. Not as much as McQueen though!!
As for a list of bikes he has owned? I reckon only Eastwood could answer that one.