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Casio Vintage AQ-240E-3AEF Teal Dial Bracelet Watch - W17561
Ref. AQ-240E-3AEF
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Stepping up in the same dial colour
The AQ-240 sits in the lineage of Casio's ana-digi watches that defined the 1980s, and this teal variant belongs to the Vintage Edgy collection — a line that keeps the original AQ-230's dual-display layout while softening the case geometry into rounder, cushion curves. The digital window stays at six o'clock, as it always has, but the sunray dial finish is new to this generation: the teal shifts noticeably under different light, reading closer to petrol in shade and brightening towards green in direct sun. At 35.8mm and 51 grams, it disappears on the wrist in a way that larger steel watches do not. The bracelet uses a sliding folding clasp that adjusts without removing any links, which is a practical advantage for anyone whose wrist size falls between standard bracelet positions.
- Reference
- AQ-240E-3AEF
- Brand
- Casio
- Collection
- Vintage
- Case size
- 35.8mm
- Case thickness
- 8.1mm
- Case material
- Stainless steel
- Case shape
- Cushion
- Dial
- Green
- Crystal
- Acrylic
- Movement
- Quartz
- Calibre
- 5154
- Functions
- Date, Stopwatch, Alarm, Dual display, Digital display
- Water resistance
- 30m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Luminous
- Retailer
- F.Hinds
Additional specifications
- Lug-to-lug
- 40.9mm
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 5 collections
This watch appears in Stainless Steel Watches (3,032), Watches Under 37mm (1,656), Watches Under £100 (652), Green Dial Watches (404) and Tonneau & Cushion Watches (164).
Manufacturer’s guarantee
What the specifications mean
Strengths
- 35.8mm suits most wrists
- 40.9mm lug-to-lug keeps the 35.8mm case wearable
- Luminous hands and markers for low light
- Sits in the lower half of Casio's range as we list it
Worth knowing
- 30m means keeping it away from water
- Acrylic crystal marks easily, though it polishes out
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | AQ-240E-3AEF | RY21862A | 24000145 |
|---|---|---|---|
| Price | £55 | £55 | £55 |
| Case size | 35.8mm | 35mm | 35mm |
| Water resistance | 30m | 30m | 30m |
| Movement | Quartz | Quartz | Quartz |
| Strap | Stainless steel bracelet | Leather strap | Leather strap |
| 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?
No. At 30m it will survive rain and handwashing, but not submersion of any kind.
Will the glass scratch?
Yes, but it polishes out. Acrylic marks easily and a scratch can be buffed away at home, which is why vintage-style watches still use it.
Does it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Will it fit my wrist?
Lug-to-lug is 40.9mm, which suits wrists from roughly 15cm (6 inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as unisex, and at this size it suits any wrist that takes the dimensions.
Cheapest place to buy
F.Hinds is the only UK retailer we track stocking this reference new, at £55. 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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