K.D. Inkwell's Chronotron backpack

The K.D. Inkwell's Chronotron backpack is a backpack skin

Characteristics
The backpack is a dark gray with three instrument panels on top and an AD sign below. On the right hand side, there is a small tank below some wired batteries, the latter wired to the antenna. There also is a Guild of Antiquities pegasus emblem on the lower left side.

Locations
The skin can only be unlocked by reaching rank 92 during the third season.