He may have been a member of the 25th Fighter Squadron of the 51st Fighter Group - they equipped and trained in the Assam Valley of India before deploying to Kunming and Yunnan-yi (that is where the 25th FS was stationed). My uncle, Clem Burton, was also a pilot with the 25th - he flew the recon plane, taking before and after photos of bridges and other targets, as well as participating in attacks.
I have a picture of the patch (Assam Draggin'), but can't attach it for some reason. You can e-mail me direct at
"firstname.lastname@example.org"and I will try to send it to you. I have a lot of photos from him and others in the squadron. He was there in 1943, and went missing in January of 1944.
I also have a copy of the roster for the 25th and 26 Fighter Squadrons, and it lists Richard Deming. He was alive in 2005, but don't know about now - here is his contact information if you want to try to get in touch: Richard Deming, 712 Mohawk Drive, Lynchburg, VA 24502, phone 804 239-0269. I did not find the other two names listed.
That vest is a real treasure, and a great connection to your grandpa.