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Two model numbers exist? Difference between “F-91W-1JF” and “F-91W-1JH
Currently, a search for “F-91W” brings up two models, “F-91W-1JF” and “F-91W-1JH. The “F-91W-1JF” is the model name prior to July 2021, and the “F-91W-1JH,” with the letter H at the end, is the latest model name. However, the model number change does not change the product specifications at all, so this does not seem to be a point of concern when selecting a product. In addition, the number before the J in the latter half indicates the color, and the lineup includes a standard model with a blue line around the LCD, as well as watches with gold, green, and black lines.
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Tips for keeping your Casio “F-91W” clean and in good shape for a long time
The ” F-91W ” has a battery life of seven years, but even if the functions do not fade, you don’t want the watch to look like a wreck. Here are some tips for keeping the highly functional “F-91W” looking good for a long time at a reasonable price.
Tips for using the Casio “F-91W” for a long time (1) “How to handle water
When using the “F-91W,” you should be especially careful when handling water. Although the watch is waterproof, it is not completely waterproof, so using it in the wrong environment can cause the screen to fog up or the watch to malfunction. For example, if the crown or buttons are operated with water on them, water can get inside and cause deterioration. High-temperature, humid environments or saunas should be avoided, as these conditions are the same as constant exposure to water. In addition, while washing with water only is not a problem, using soaps, detergents, or other cleaning solutions with the watch still on the wrist can also cause malfunctions. In order to maintain the water resistance well, it is recommended to replace the gaskets every 2 to 3 years, so regular replacement will ensure a comfortable experience. If you understand how to use it properly, it will surely be one that you can use for a long time.
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Tips for prolonged use of the Casio F-91W (2) “Wipe off sweat, dirt, and moisture regularly.
Like clothing, watches are in direct contact with the skin. To ensure long use, it is important to keep the watch clean by wiping sweat, dirt, and moisture off it frequently. If the watch should come in contact with seawater or mud, immediately rinse it well with fresh water and dry it in a well-ventilated place free from moisture. Resin bands can always be kept clean by washing them with water and wiping them with a soft cloth. Leaving the band soiled or storing it in a humid place will cause it to deteriorate over time or break or snap. It is recommended that the crown and rotary buttons be turned or pressed periodically even if the function is not used, as they may become hard and slow if not operated for a long period of time.
