C1479 From the Night of Curse(36)

On the surface of the Treasure Room gate, there was only a simple digital wheel, holding a rusty ancient iron handle on the edge of the wheel that was used to open the gate.

This was originally a simple and crude design, but Palamedes only needed a single glance to confirm that the interior structure of the door was definitely not simple. Rosetta held onto the surface of the spinning wheel