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Operating Environment| operational temperature range | –10° C ~ +60° C (14° F ~ 140° F) |
|---|---|
| magnetic resistance | 4, 800 A/m (60 gauss) |
| water resistance | up to 200 meters |
Movement| vibrations per hour | 21, 600 |
|---|---|
| driving system | Self-winding type |
| jewels | 21 jewels |
Details on the use of promethium-147 in luminous paint and its regulation.
Checklist of essential checks for the watch and diver before commencing a dive.
Advice on ensuring sufficient winding for accurate timekeeping.
Specific timing recommendations for setting the day and date to avoid issues.
Explanation of the bezel's unidirectional rotation for safety in time measurement.
Optimal operating temperature range and effects of extreme temperatures on watch accuracy.
Warning about strong magnetism and advice to keep the watch away from magnetic objects.
Caution against exposing the watch to solvents and other chemicals that can cause damage.
Recommendation for regular professional checks to ensure seal integrity.
