The former POW's are wearing name tags on their shirts for the reunion. The tags read they were part of the 15th Airborne. There was no such active unit during WW2.
The seat belt buckle from Shigato's car that Danny and Steve are examining does not show any damage at all despite the fact that it was in a car that just exploded.
Near the end, Epstein is shown riding in the back seat. The interior view shows the right rear door interior trim as a button tuck style. As he exits the vehicle, the right rear door interior trim is a roll and tuck style. Two different vehicles with similar interior colors were used.