For those who don't know, the "425" emblems were used on '67 Delmont 88s so equipped. The font is reminiscent of that used on the similar era 442 emblems, and nicely matches the "Jetstar" script on my car. Nice thing is its not permanent (posts were removed and they are installed with double sided tape), so I can easily remove them when and if I decide to.
Here's what the emblem looks like in its factory application:
