Precautions when Opening and Closing the Case
The following precautions must be taken when opening and closing the case, but it is safer to avoid opening and closing as much as possible, so if there is a significant time error or other malfunction is discovered, please return the product without touching it.
We will cover the actual cost for repairs and parts replacement after use, but details will be announced at a later date.
1. Opening the case is the same as opening the regular case, but the bite is strong, so please be especially careful when using a wrench.
2. When closing, please pay close attention to make sure that the O-ring is properly seated in the groove, that it is not deformed, and that there is no dirt or debris on it.
3. Apply a thin layer of grease to the O-ring.
4. Before closing the case back or glass edge, make sure the air inside the watch is as dry as possible. (Put it in a desiccator with desiccant for about an hour to avoid trapping humid air.)
5. The glass rim and back lid are difficult to close by hand like regular rims, so use a press-fitting tool.
The case back and glass edge are in the center of each side. Fit them together, place them on the press-fitting tool, align the centers well, and press firmly to fit them. As for the press-fitting tool, attach the Parawater frame to the commonly used glass press-fitting table.
Waterproof Test Method
After closing the case, you must use a water pressure tester to check whether the waterproofness is complete, but among the various types of testers, it is more convenient to use a tester that does not allow water to get inside the watch.
Whether it is a vacuum type or a pressurized type, a water pressure test of around 0.5 atmospheres (pressure equivalent to 5 meters deep) is sufficient for practical use.
When applying it to a tester, I think it is better not to apply strong pressure right away, but to check for leakage at around 0.3 atm, and then test it by applying 0.5 atm only after you are sure it is okay. Also, be careful not to confuse air bubbles coming from the gap between the grooves and spring bars with those coming from inside the watch.
Repairs are done by the Shoji Repair Department…
This concludes the general explanation of the Parawater case, but in order to avoid any inconveniences that may occur due to work lapses, our repair department will be responsible for repairs for the time being. Thank you for your understanding.