Grand Seiko saved from the "Dead Zone" (Caliber 6246 / 62GS Repair)

In this video, I revive a legendary vintage Grand Seiko Caliber 6246 (62GS) that was completely paralyzed. Neither the time nor the date could be set. The watch was a total brick.
The culprit? The infamous "Dead Zone" (or Danger Zone). Someone previously forced the quickset date between 9 PM and 3 AM, causing the day and date discs to warp, jump out of their tracks, and violently jam the entire gear train (including the hour and minute wheels).
Watch me disassemble the calendar mechanism under the dial, realign the slipped discs, and bring this 1960s masterpiece back to life.