Elimination

Lumian carefully examined the pocket watch, ensuring that there were no mechanical issues.

He hadn't bumped or jostled it in the past hour, so there should be no reason for it to malfunction.

Ever since I calibrated my pocket watch, the only odd occurrence had been the fugue state and the faint ringing of a bell when I left the Alone Bar. Additionally, there is one less monocle-wearing guard at the entrance of Salle de Bal Unique. Could there be a connection between these events and the sudden one-minute slowdown of my pocket watch? Lumian pondered this seriously, trying to come up with possible explanations.

He planned to write and inquire with Madam Magician once he returned to the market district.