Dan Henry 1970 Diver automatic instructions
Your Dan Henry is powered by the Seiko NH35, an automatic movement that is often referred to as “self-winding”. Automatic movements harness energy through the natural motion of your wrist. No battery is necessary.
If worn every day, your 1970 diver will not need winding. If the watch is not worn for several days, wind it for initial power (see Crown Positions).
The crown functions in three positions:
1. Unscrewed (wind the movement)
- To wind, rotate the crown clockwise. (If the watch has stopped because the automatic movement has run out of power, wind about 50 rotations if you have not used the unit for a while).
2. Partially pulled out (change the date)
- To advance the date, turn the crown counter-clockwise. (Do not adjust the date between 9pm–3am, while the date gears are in motion to change the date)
3. Fully pulled out (adjust the time)
- The seconds will stop. Rotate the hands to set the time. (We recommend you only turn the hands clockwise for the long-term health of the movement).
Inner bezel diving timer
Your Dan Henry 1970 is a diver watch is equipped with two crowns, the upper crown rotates the inner bezel, originally was used for professional divers to measure their diving time.
Your Dan Henry 1970 is a real diver's watch, tested under three different conditions to resist water to a deep scuba dive depth of 200 meters.
To ensure water resistance, the crown must be turned to the fully closed position. Do not operate either crown while under water.
Screw-down crown (only for the 40mm case version)
- The lower crown sets the time and date. This crown screws down to improve water resistance and protect the movement.
- To open the crown, turn it counterclockwise until it is no longer threaded.
- To secure the crown after adjusting the time or date, gently push in the crown to align the screw threads; then turn clockwise.