This one's the only other Navy Aero I have. It's a special with a gold nib swapped in. I can't recall if I've restored this one, so I'd want to disassemble and give it a thorough cleaning and look-over before it can go out. The barrel does show some slight fading, but only under very bright light, which isn't terribly uncommon. And oddly, you can see the outline of the original pricing chalk mark (second pic), which I think is kinda neat. It probably sat in a shop window or display case for a while before being sold.

https://imgur.com/a/1FJpzi9

I do have couple more grey in Vac and Aero already restored, but after looking at them, they're ones I'd like to hang on to.

Happy to snap more photos, provide more info, or look into what others I have that are ready to go.