Ancient Chest古代の宝箱

This chest seems to be thousands of years old.
In-game description

What you get from salvaging Ancient Chest (Salvage and Repair Station)

Ancient Chest can be salvaged. Salvaging it gives the following items.

For each material, the amount is "amount used to craft × 0.49 (lower when durability is down, 0.3 at 0 durability) × the item's multiplier", and a fraction is the chance of one more (2.4 means 2, with a 40% chance of 3). The range is from 0 durability to full durability (items without durability always count as full). Scrap parts are a fixed number set by the item level. All items that can be salvaged are listed in salvaging.

How to get Ancient Chest

Placed inside dungeons or scenes (buildings, ruins and so on); break it or pick it up to get itPlaced in: Sealed 3-Wing Temple [Azeos' Wilderness], Sealed Chapel [Azeos' Wilderness], Ancient Gateway Ruins [The Undergrounds], Ancient Pillar Ruins [The Undergrounds], Large Maze [The Forgotten Ruins], Clay Hut [The Clay Caves], Small Forlorn Metropolis [The Sunken Sea], Large Forlorn Metropolis and 13 more

Scene containers, dungeon placements, guaranteed drops and natural spawns are based on the Obtaining data of the Core Keeper Wiki (Fandom) (CC BY-SA 3.0), because these are not in the game files this site reads. Scene names are the wiki's English names.