Hello, you have done a beautiful job of that restoration.
My wife has a very similar Diamond from the early '70's. She bought it second hand in the '80's so we don't know it's original history. The bike has given and continues to give her great service and a lot of pride and pleasure of ownership.
I would like to restore it for her (you have inspired me!) but I have been unable to find decals like hers. While the front badge is different, the vertical and horizontal frame decals on hers are nearly identical to yours albeit nearly worn off.
Where did you source your decals? I would love to be able to bring her bike even vaguely close to the restored beauty of yours.