There’s a really old movie about an eccentric woman who gets awestruck at one point when she spots a workman in overalls with a loop like this - typically used to carry a hammer. She breathlessly explains that “the loop” is the sign of a true master with in-depth knowledge and experience, almost like he’s part of a priesthood. I have no idea what movie it is. I can picture her face vividly but can’t come up with a name.