Anthony Daniel MD
The "B640W" series is not too well known, perhaps b/c they are relatively new. It's a line of retro-esque Casio watches added to the collection around March 2012. There are different colors available (google "Casio B640" and you'll see the lineup) and not all colors are available in all regions of the world. I have the black on black version w/ negative display (it looks amazing btw) and the official model name is "B640WB-1BJF" (tho the back plate just says B640W), which is the Japanese model name (I got it in Japan) but the same watch in Europe is "B640WB-1BEF"... notice the difference in the "J" and "E" in the model name to denote region.The description of this particular model, B640WC-5A, says "Men's Bronze Rose Digital Retro Stainless Steel Watch"... I question the "Men's" part (I'm a dude) b/c I don't think I would personally wear this colored watch but I can see hipsters sporting it. It's really a beautiful color not seen in other Casio watches and the description of bronze/rose is correct. I think this watch would be more popular among the female fashionista crowd... and I will say, when my stylistic female friends saw pictures of this, they fell in love with the color. With their backing, I was confident enough to pick up 2 of the bronze/rose ones for my sisters as Christmas gifts. Unlike the black version, this color IS available in the US. I paid around $35, which is about half the price of what I paid for the black/black one in Japan. It's not as cheap as the ever-popular A158/A168/A178 silver versions but the price is right in line with the gold A168 (which used to be readily avail for less than $25, then climbed up to $35, and now north of $50...sigh...)and since I think the bronze/rose color is a "special" color, I think $35 is justified. Actually it's not a bad price. Also, unlike A158/A168/A178, it looks and feels more expensive and you certainly won't be finding them at your local Walmart/Target like you do with A158/A168. B640W is also available in the standard silver version (B640WD-1A) but IMO, looks rather bland and doesn't differentiate itself enough from A158/A168. Definitely stick with the special colored versions if you can find them.As with many other retro Casio watches, the band is stainless steel (good) but the watch housing is plastic (bad). Oh well, I don't think we'll be seeing all stainless retro watches of the vintage 80s originals anytime soon.Word is that the watch functionality itself is exactly the same as the venerable and iconic G-Shock DW-5600. I like that while in stopwatch and timer mode, you can actually see the time of day in the top right corner. What is missing that I would have liked is dual time. A178 has it and I love it. Wish all watches had world time or at least dual time. One thing I noticed was that the watch face and the housing's plastic is easy to scratch. I have A168 and A178 and the watch face remains scratchless. I now have 2 small scratches on the B640W watch face and I don't know where they came from. Hmmmm....If you're interested in the B640W, go ahead and pick one up now. I'm not sure whether this is a permanent collection or a limited release. I would guess the latter.[Update] There seems to be some questions about the size of this watch. If you're are guy and used to "guy's" watches, it may feel small at first. This watch is about the same size as other retro-styled, long-running, Casio watches such as A158 and A168.[Update2, 4/2013] As suspected, looks like B640W is sadly no longer avail for sale in the US. A browse thru the Casio US webpage no longer displays the watch.[Update3, 7/1/2015] If you search for this watch on Amazon, the model that you'll see is B640WC-5AEF. I think this is the model intended for Europe. Unfortunately, the one for the US market, B640WC-5A, is no longer available and it seems Casio does not officially sell this watch for the US market anymore. When I ordered the B640WC-5A before, it came in a nice hard plastic case with a clear front cover. When I ordered B640WC-5AEF from an Amazon reseller, although I got the same watch, the watch was delivered as just the watch with an instruction booklet (no box!), which was disappointing b/c it makes it difficult, if not impossible to give it as a gift. I had a spare paper Casio box from my other purchases (I've bought many retro Casios in the past) so I used the box on that and gave it away as a gift. Just be warned.

Edward Blake
I first bought the Casio B640WC-5AEF Ladies Retro Digital Watch in Rose Gold in February of 2014. I'm just writing this review now because it is time to reorder. The battery of 8.5 years is finally failing and it gave me a good run. I've worn this watch, on average, 5 days a week. I use it to return from lunch on time. I use it to time fitness activities. It reminds me of the day & date when each of them seem the same as the last. All of that and it's beautiful too. I will likely get a new battery for this one & use it for the more rugged non-work activities because the rose gold is rubbed off where my wrist rubs against the desk. But that is the ONLY section of the wristband that is rubbed off. The finish on the rest is like new. The new one, I'll use for socializing & job interviews when appearance matters. Yes, I know many people use their cell phone for time keeping & such, but this watch is like a fashion accessory and it's very handy at the end of my arm.I have not been compensated in any way for this review.

Alexander Gill
This watch is classic, simple and has all the features you need and none that you don’t. I was tired of grabbing my phone from my pocket to check the time or date - now it’s all in the wrist! I miss it if I forget to wear it. I realized that it also helps me feel aware and connected to time without having to get potentially distracted by a my phone. It’s nice having that purposeful separation. The rose color is nice, it’s easy to adjust (though you’ll likely have to do a YouTube search to see how to do it as the directions with the watch don’t show you how.) The small receiver clasp has a tiny engraved arrow that you put a pin beneath and pop up to slide the clasp up or down the band to adjust, then you pop it back down.I’m really happy with this purchase. Glad I didn’t go with an Apple Watch!

Adam Mitchell
The color is amazing

Susan Nguyen
The watch came in perfect condition, I really love it , is stylish to wear it everyday.

Shawna Morgan
Watch has a fine presentation. Color doesnst stand out too much. Its a nice tone. She said this watch was light and comfortable. Easy to adjust by following manual instructions. 24hr time has to be adjusted through another method in comparison to the F-91W 24hr you can press the right button and it instantly changes. This was a feature I was hoping that would come with this watch because it comes in handy in her line of work. The backlighing works excellent. The watch clasp undid itself while wearing for a few minutes. I dont like that the case is made of plastic. It was a gift. So i will follow up with her and ask if it continues to unclip I may have to return it. I feel like it deserves 3 star rating because of the inability to instantly convert to 24hrs and the plastic casing. but because she really liked it i will give it 4 stars.

April Prince
High quality, great watch