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Casio Edifice EFS-S650D-2AEF Solar Chronograph Bracelet Watch - W17547
Ref. EFS-S650D-2AEF
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Stepping up in the same dial colour
The EFS-S650D sits at an interesting point in the Edifice line as one of the first models in the range to introduce a ceramic bezel insert — a material that was, until relatively recently, the preserve of considerably more expensive sports watches. The styling reference is deliberately automotive: the proportions and finishing treatments echo the instrument panels of high-performance cars rather than conventional watch design, which gives the blue dial more visual depth than a straightforward sports chronograph would typically offer. At 40.9mm with a 46.7mm lug-to-lug, this wears closer to a 39mm conventional case than its diameter suggests — the integrated flat-link bracelet and slim profile keep it against the wrist rather than proud of it, and 140 grams is noticeable but appropriate for steel of this construction. The solar calibre holds a charge for five months in darkness, which means it will still be running when pulled from a drawer after a long absence.
- Reference
- EFS-S650D-2AEF
- Brand
- Casio
- Collection
- Edifice
- Case size
- 40.9mm
- Case thickness
- 11.7mm
- Lug width
- 12mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Movement
- Solar
- Calibre
- 5529
- Functions
- Chronograph, Date, Solar powered
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Three-fold clasp
- Lume
- Luminous
- Retailer
- F.Hinds
Additional specifications
- Lug-to-lug
- 46.7mm
Learn more about Casio
Tadao Kashio founded Kashio Seisakujo in Tokyo in 1946 as a machine shop. The company's first success was a finger ring that held a cigarette, and its second was the 14-A of 1957 — the world's first all-electric compact calculator, which used solenoids rather than gears.
Casio entered watchmaking in 1974 with the Casiotron, a digital watch with an automatic calendar that knew the varying lengths of months. The company approached watches as an electronics manufacturer rather than a horological one, and that difference produced the G-Shock.
The G-Shock came from a single engineer, Kikuo Ibe, who broke a watch his father had given him and set out to build one that could not break. The specification was three tens: survive a ten-metre drop, ten bars of water pressure, and ten years of battery life. It took over two hundred prototypes, and the solution was suspending the module inside the case on a cushioned internal structure rather than mounting it rigidly. The DW-5000C shipped in 1983.
It became one of the most durable product designs in any category, adopted by militaries, emergency services, and skateboarders alike, and Casio has since added solar charging, radio and GPS timekeeping, Bluetooth, and full-metal and carbon variants.
Casio also produces the Edifice, Pro Trek, and Oceanus lines, and remains an independent Japanese public company.
- 1946
- Tadao Kashio founds the company in Tokyo.
- 1974
- The Casiotron is Casio's first digital watch.
- 1983
- The G-Shock DW-5000C survives Kikuo Ibe's three-tens brief.
- 1994
- The Frogman extends G-Shock to ISO dive certification.
Also in 6 collections
This watch appears in the Casio Edifice range (21), Back in Stock (5,018), Stainless Steel Watches (3,307), Chronograph Watches (1,281), Blue Dial Watches (914) and Solar & Kinetic Watches (241).
Manufacturer’s guarantee
What the specifications mean
Strengths
- 100m water resistance covers swimming and watersports
- 46.7mm lug-to-lug keeps the 40.9mm case wearable
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Casio Edifice EFS-S650D-2AEF Solar alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | EFS-S650D-2AEF | SNE525P1 | AW1750-85E |
|---|---|---|---|
| Price | £175 | £175 | £159 |
| Case size | 40.9mm | 40mm | 41mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Solar | Solar | Solar |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| This watch | Closely matched | Closely matched |
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 100m it is rated for swimming and snorkelling, though not for diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It charges from light, and the cell behind that is designed to last a decade or more.
Quartz, automatic and solar comparedWhat size strap does it take?
12mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 46.7mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's.
Cheapest place to buy
F.Hinds is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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