Here you go Hanzo, you can read all about it.starting at the bottom of page 1. https://support.casio.com/storage/en/manual/pdf/EN/009/qw2632.pdf
As a prepper, I have thought about how we would tell time after the SHTF! ALL of the electric and battery powered clocks and watches will be dead. The surviving smartphones and computers will be too valuable to carry around as time pieces. Mechanical, solar and movement powered watches will be invaluable, as will wind-up clocks!
If things are at that stage, no need time keeping per se. The sky will tell you how much light you have.
Worth keeping some in storage. Affordable, easy, rugged, dependable... https://www.amazon.com/dp/B0DTB5641V/?tag=survivalmonke-20 The Casio AE-1600H Series 10 year battery (CR2032) LED backlight with afterglow 100m water resistance Bold large face design 1/100-second stopwatch Countdown timer with auto-repeat 5 multi-function alarms (including 1 snooze alarm), and hourly time signal. Supports both 12-hour and 24-hour formats Very accurate, ±30 seconds per month Or if you want something about 10 Dollars less, https://www.amazon.com/dp/B09Z4T3C8N/?tag=survivalmonke-20 The Casio W737HX Series is also a fine choice.
For many years now it's been just this Maratac large Pilot. No batteries, no frills. Just big and clear.
Traser H3 P69 Blk Stealth Blk. Hacking swiss ronda 515.24 quartz. Super-luminova sapphire w/pvd coated ss body and trit vials. With discounts I payed $340. The official band I payed ~$88 through a dealer in RI. Very accurate and only have to mess with it once a month if the date is off. My only other watch is the Nixon Regulus which is nice too for when you don't want to mess up the nice one.
Keeping whatever you're wearing on your wrist is equally important. I don't know if this is even an issue with modern watches, but when I was wearing an issued Hamilton mechanical, and a couple other ancient mechanical watches, I had issues with breaking spring bars. I'd find the watch retained on the band on only one side. This was obviously more than a little annoying. I had both the original 1969 vintage Hamilton spring bars replaced with Rolex parts and never had another issue. So on older watches, I now consider it cheap insurance to replace the old spring bars with quality new parts.
There are some really fine time pieces in this thread. I think I stopped wearing a watch sometime around 2012. Quite possibly even before then. But if i needed a watch again it'll be one of those in this thread.
No doubt. I only wear a watch to look more business-like. A rotating crown is great for simple stuff like keeping track of random stuff such as a cooking pot or parking meter, God forbid. When I lived on Maui, no one I hung out with ever wore a watch. I found an expensive diver type watch, gave it to my next-door neighbor surfer kid friend. He put it on his ankle, went surfing and lost it so someone else could find it. There's a company I can't recall (bulova?) who makes a watch with a 240KHz? crystal that is extremely accurate. I would love to own that one. I absolutely refuse to spend ginormous amounts of money on a watch. I just need it to be rugged and accurate with simple controls. My Traser fits the bill at $340 and they retail for twice that. $400 was my max but I had to get the correct band as it came with a surfer band which made it even bulkier while the aftermarket rubber ones didn't fit right at all.
I have tried wearng a watch several times but eventually take it off due to discomfort and in the way working on equipment.. I don't need to know the time seeing there are clocks everywhere and in the woods its the last place I need to know the time. I have wind up dollar watches but they die due to shock and impact with equipment. During the day it' easy enough to tell time just looking at shadows as the day goes by. About the only concern for knowing what time it is , is for doctors appointments and such , and for that my apple cellphone is sufficient.