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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 Casio's range
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.
This watch appears in Stainless Steel (2,298), Chronographs (985), Blue Dials (615) and Solar & Kinetic (103).
Manufacturer’s guarantee
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.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It charges from light, and the cell behind that is designed to last a decade or more.
What 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.
Is 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.
Who are F.Hinds?
F.Hinds has been run by the same family since 1856 and is now in its fifth generation, with more than 115 shops across England and Wales. They are a member of the Responsible Jewellery Council and an Authorised Diamond Dealer.
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