No greenhouse, so unlikely.Do you have a greenhouse? Looks like a clip from one of the louvre vents, although at 60mm maybe a little short.
Clippy cover for the hole where the graphic card would poke out the back of the case if you had one?No greenhouse, so unlikely.
Wondering if computer related, does have a springy clippy look to it and zintecky feel
Over 30yr old and was important.....till i sat on it the other dayThe metal bit. No idea.
But the scale rule is important.
Scaffolders fence clip?
(see elsewhere)