Grille badge on some 63 Valiants, not others - why?

I notice that some 63 Valiants have a triangular badge on the grille, others don't. I had thought this was a Signet thing, but now I'm seeing Signets without it. Is it an early/late thing or a trim option or what? Anybody know?

https://i.ytimg.com/vi/2tPuxASteTs/maxresdefault.jpg

https://i2.wp.com/www.curbsideclassic.com/wp-content/uploads/2014/04/63Valiant5jg.jpg