Dead Man's Chest

Dead Man's Chest is a furnishing.

Source
Dead Man's Chests can be crafted or obtained from exploratory voyages.

Crafting
Dead Man's Chests can be crafted by armorers as a level 50★★★ recipe with the following materials:
 * x3
 * x1
 * x2
 * x1
 * x1
 * x2
 * x1

Exploratory voyages
Dead Man's Chests can be obtained from a company submersible exploratory voyage to the following areas:
 * Concealed Bay
 * The Wreckage of the Headway
 * Stone Temple

Desynthesizing
Dead Man's Chests can be desynthesized by armorers into one of the following: