I have a similar Gun-sight type ornament that has been on my 63 Ford 300 for many many years. I assume it is not original as the point of the 300 as a fleet vehicle was to go bare-bones, easy to paint, little trim... And I’ve never seen another 300 that has one. It has a diamond/square instead of a circle like all the Buick’s I’ve seen. Any ideas where it came from?