90th Bomb Group

My Great Uncle, Sergeant Jewel Alfred Rivers was in lieutenant Cunningham's crew. I am trying to find out what the name of their plane was. I also have every letter he wrote to his wife up until the night before his crew was lost. any help is appreciated. i will share pictures and letters.

The plane they were flying when they went down was 44-41258 and it does not appear to have had a name or nose art.