Secret code

Exploration Stage: Mansion by the Canal
From: Detective
Description: Think how much Saltaformaggio's invention will help my research! I can't rely on my skills alone in a city full of anomalies. There's some symbol on the lid of Saltaformaggio's treasure chest. It's a code! You're going to need to find a disk-shaped cipher instrument to decipher it.
Completed: Hmmm, the disk cipher machine sounds complicated...but I'll gladly take the time to understand how it works for the secret of the Salta Formaggio.