Amazon.com: Casio CA53W Vintage Series | Green | Data Bank | 1/100 SEC Stopwatch | Water Resistant | 8 Digit Calculator | Dual Time | Resin Band | Resin Case | Auto Calendar | Daily Alarm | 5 Year Battery : Clothing, Shoes & Jewelry

Very nice watch at a very low price. Works very well but if you actually need a calculator you should use a calculator or your smartphone. While functional, the calculator buttons are VERY tiny and the numbers are very difficult to read because of their size and color. Looks nice on the wrist, lightweight, and quite functional. Casio makes very reliable and modestly priced watches. Very happy.

This is my 2nd watch. The part that holds the excess wrist strap down broke, but the band itself is fine. Unable to find another band, I just opted to buy a whole new watch for 16 bucks. My first watch was purchased in December of 2012. It is now December 2017, and it is still working with that same battery. I have no idea how long the watch was running when I bought it, but I would say that 5 years out of the battery is normal.This watch is great. It is light enough that I do not feel the need to take it off. It is water proof for the things I do...occasional swimming and I leave it on when I shower. I have hit this watch on numerous things like counters and it has taken a beating and the watch is without scratches and works just as good as the day I bought it. This watch can take a beating. I wish that it had a light, but that's my only thing that I would change. And this watch gets people's attention if that's your thing. I have never had so many people make comments about how cool it is, and I have some pretty nice watches. This thing has received at least 10 times more comments than all of my other watches combined. The nice thing is that I never have to worry about someone trying to steal it, as opposed to my other watches. I like the look. I like the price. I have nothing bad to say about this little watch. If you are like me and grew up in the 80's, always wanted one of these watches but did not get because they were so expensive back then, I highly recommend this. Especially if you travel to the Caribbean via cruise ship and need a good watch to go swimming with, but not want to draw too much attention to yourself and to make sure you get back to your ship in time.

I always wanted one of these as a kid in the 90s. My father, who was a teen in late 70s and 80s was concerned that I would get made fun of at school because, not only were they more expensive back then, only super-geeks wore calculator watches when he was in school; I guess that still applied to the mid-to-late-90s as Casio Calculator Watches hadn't become old enough to be retro-chic yet. My friend, a 30-something exec, recently bought one and I was immediately reminded of how badly I wanted one as a kid and was ecstatic when he told me it was only $15.Upon first purchasing the watch, I felt that I would mostly just use it as a fashion statement more or less -- some kind of geek hipster I guess. But I use this thing all the time: Tips on food, BitCoin conversions, tallying my PostMates delivery totals, all kinds of daily math! I have a genuine need for the second time zone too, having relatives and family in another country and I use the stopwatch frequently to time things like workouts and bike rides as well as walking times to all the facilities I use on a daily basis so that I can find the fastest routes (I'm a big nerd, I know). I probably use this watch for something other than telling time around 10 times a day.I have an iPhone and, sure, I could do all the same things on the iPhone and more than this cheap little watch, but the watch is right there on my wrist! I don't have to take it out, unlock it, and find whatever app I need to use, I just turn my wrist and get straight into it. Sure, I could get an Apple Watch, but I don't see the need to spend $350 on what is essentially a second phone at this point in my life and many of the same problems that come from the complexity of so much versatility would still get in the way. And I can't imagine what using a calculator with such a tiny touch-screen would be like. Even if they're tiny, the Casio's buttons are physical, which goes a long way to being easy to press.If you are a fan of calculators, geeky things, cheap useful things, or Back to the Future and Marty McFly don't hesitate.This watch is fantastic. Casio was way ahead of their time in the late 70s and 80s, not with just this watch but all the fitness and calculator watches they produced. This is an icon of an era of extreme leaps in personal computing technology.Features:* Watch (either 12 or 24 hour) with day of the week indicator and toggle to see year, month and day* Basic Calculator supporting up to 8 digits and supporting addition, subtraction, multiplication and division, as well as basic exponents* Alarm (can also set an hourly chime from here)* Alternate timezone* Stopwatch: chimes every 10 minutes, can record multiple laps.PROS: Cheap! 5 functions: Clock, Calculator, Alarm, Alternate Timezone, Stopwatch Option to have watch chime on the hour Can technically multitask (run the stopwatch in the background while you use other functions) Durable and Water Resistent Alarm is a good volume Keeps precise time (I synced it to time.gov several days ago and it's still accurate to the precise second) Because of it's simplicity, it just works Surprisingly feature-full for such simple technology.CONS:- I personally wish the holes in the arm band were offset 50%. One hole is slightly too tight and the next is slightly too lose. That's just a nit-picky personal problem though.