The Aurora High School mascot is also the Hound Dog.

For ages this was the Hound Dog Diner in Aurora, Missouri. The new owner changed the name to The Blackbird but left the 203rd DUI on the side of the building.

I'd leave it alone, unless your girl is wearing it. LOL 

While I don't have an opinion about proper cleaning or polishing of military insignia (its yours, you can do what you want with it), I do highly discourage anyone from using dip-based, instant tarnish removing chemicals.  These dips are extremely harsh, use acidified thiourea (known carcinogen), and over time will etch away the surface of the item.  I note that this item is gold filled.  Dips are harsh enough to possibly remove enough gold to reveal the underlying base metal.  If you do decide to polish it, or any other antique item, it is worth reading the advice on Jeffrey Hermann's (a professional silver restorer) website:   https://www.hermansilver.com/care.htm

Aye,   (Inverted) Airship mark

Another period First Army shoulder cord.   Shade  

I understand completely. As a history buff, writer, and screenwriter, I know how hard it is to extract one thread for a compelling, truthful narrative. The wide, fluid, complex flow of group dynamics in reality don't lend themselves to the beats and character arcs required for a good movie. Personally, I've started and failed a screenplay about the 45th infantry division. I've also started compiling notes and ideas for stories about Operation Tidal Wave and the Chosin Reservoir; nothing has clicked yet. 

Would appear so LOL

I will have to take a look later as I keep getting this notice when i click the link