The manual explains how to safely operate the Citizen 901 watch, including safety warnings, setting the time and date, and manually winding the mainspring. Detailed instructions cover crown positions, rotating directions, and special considerations for date changes between 8 PM and 2 AM.
It also describes routine maintenance such as cleaning, band care, and periodic inspections every two to three years, and lists the watch’s technical specifications including accuracy, power reserve, and vibration frequency. This manual is written in Chinese.
| Movement Type | Automatic mechanical watch |
|---|---|
| Accuracy | -10 seconds to +30 seconds |
| Operating Temperature Range | -10°C to 60°C |
| Display Functions | Hours, minutes, seconds, calendar |
| Power Reserve | Approximately 42 hours |
| Vibration Frequency | 28,800 vibrations per hour |
When the watch has stopped, rotate the crown clockwise about 40 turns to fully wind the mainspring; further rotation will not damage it.
It is recommended to have the watch inspected every two to three years and replace the water‑resistant gasket as needed.