US Coin....image rubbed almost away on one side

I have some of my Grandfather's things such as coins he has from various parts of the world. He was in the Army Air Corp for a long time and flew with the Royal Air Force in England during WW II.

My Grandfather continued his travels throughout the world and the US ultimately reaching "full bird Colonel' rank. My biggest memory of him, as my Dad was in the Air Force so I was an AF brat and we moved about every 2 yrs, is he always had to have coins in his pocket. He'd keep hands tucked into both pant pockets and jingle the coins. :)

I took pics of the coins I found in a very old jewelry box (World coins) although I guess I need to take pics of a few US Coins and post elsewhere. He also hand a few Moroccan bank notes? (are they called notes?) Unsure if those are worth taking pics of or not. Seems to be a ton online.

I wish this coin hadn't worn away so much! "In God We Trust" Trying to place it.