Specifications:
Brand: SHANGHAI
Model: GUOBIAO
Style: Classic business mechanical watch
Movement: Automatic mechanical movement
Power reserve: 8 days
Case material: Synthetic sapphire crystal
Features: Roman numeral hour markers, dual date window at 3 o'clock, long bar hour markers
Water resistance: 5ATM
Case back: Transparent, showcasing the mechanical movement
Adjustment method:
1. Wind the crown upwards to manually wind the watch, wind at least 30 turns when first wearing
2. Pull the crown to position 1 to adjust the date by rotating the crown upwards and adjust the day by rotating the crown downwards
3. Pull the crown to position 2 to adjust the time by rotating the crown downwards
4. After adjustment, push the crown back to its original position for normal operation
Note: The watch adjustment method involves rotating and pulling out the crown to different positions for winding, date adjustment, day adjustment, and time adjustment.