"It's locked via a combination lock. Looking closely, you notice the numbers "385" written on the corner."
— In Resident Evil 0
The Duralumin Case is an item in Resident Evil 0, it contains the Handgun Parts once opened. In Resident Evil 3: Nemesis, defeating Nemesis in the main game and rescuing persons in the Mercenaries will drop cases that hold different items. However, when picked up, they only show what's inside the case. In Resident Evil 4 and 5, there are cases that contains weapons, ammo, money and even treasures.