Discarded Clock Dial
The Discarded Clock Dial is an event currency in Arknights.
A once treasured clock, now reduced to nothing more than a broken dial with some small value only to collectors. You find things like this in abandoned houses. A clock silently keeping the time can be priceless, or worthless. The hour hand on the dial is stuck in place, vainly trying to turn.
Usage
A fond reminder that time always goes by and any events that happens in between are worth reminiscing, these broken clock dials can be obtained and exchanged for various items at the Flea Market during the Rewinding Breeze event.
Acquisition
Discarded Clock Dials are awarded by clearing any operation except Challenge Mode, Annihilation, and Extreme Mode operations during the Rewinding Breeze event, with the amount being equal to the 
Sanity spent to run the said operation.