Rusty Cog

A well preserved cog that must have been part of some ancient machine. This could be dwarven technology.
Overview
Rusty Cog is a donateable item and a crafting ingredient used in tailoring. Donating it contributes to the total number of Museum donations, so it has permanent value even after it has been turned in.
Its main practical use is at the 


Because it serves both as a Museum donation and as a tailoring dye item, players who want to complete collections or experiment with clothing appearance may want to keep at least one copy before donating extras. If a player is focused on museum progress, however, donating it immediately still advances the donation total without needing any special condition or preparation.
Official description
A well preserved cog that must have been part of some ancient machine. This could be dwarven technology.