One thing to keep in mind, I'm not certain those were made in Duluth. At some point, after the triangle Corp bought diamond, they were mixed into the Crescent brand. AA says adjustables are near identical and shows photos. They have the panel extend all the way to the thumb wheel, like codys wrenches. Which are nice btw there seems to be a lot of NOS Diamond tools floating around.
Which leaves me with questions.
So did diamond dip the handles or triangle start that?
Were triangle Diamonds made in Duluth using tooling from outside, or were they made in crescent facility and rebadged?
Rebadged crescents could be the most collectible diamond tools?