Hoping this finds you well. Please contact me soonest as I have information regarding your uncle. I was a Marine stationed in Okinawa, Japan in 1987-88 and 1992-95. I actually have a recovered dog-tag belonging to PFC John B Quinn Jr found in a cave on Okinawa and would be thrilled to get it back to your family. Also, there are records indicating PFC Quinn was not recovered during WWII (Defense Prinsoner of War * Missing Persons Office) and a memorial was placed in Honolulu HI with his name.
Major Kerry J. Quinn USMC (Ret) c540-295-1910