Your Dad was in the 421'st "A" Battery, which was the same battery that my Dad was in. He was also a member, along with my Dad, of the "Rocketeer Association," which means he must have received the 421st's history book "A History of the Desert Wolf." I have my Dad's copy of this book, and there is one picture of your Dad in it with a large patrol group from Battery A. He is listed in the book under a Los Angeles address.