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Casio Vintage F-91WC-4AEF Digital Pink Strap Watch - W59165
Ref. F-91WC-4AEF
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Stepping up in Casio's range
The F-91W is one of the most produced watches in history, and this variant swaps the standard black livery for a pink strap and matching resin case — a colour option rather than a redesign, which is exactly how it should be read. The original formula, unchanged since 1991, needed no revision. At 21 grams, it is essentially absent from the wrist — the kind of watch people forget they are wearing, which for its intended role is the whole advantage. The module 593 at the heart of it has a reputation that long outlasted the official seven-year battery rating, and a monthly variance of no more than thirty seconds is honest accuracy for a watch of this type. The backlight is a single green lamp rather than a painted dial, which tells you something about how simply it is made and why it lasts.
- Reference
- F-91WC-4AEF
- Brand
- Casio
- Collection
- Vintage
- Case size
- 35.2mm
- Case thickness
- 8.5mm
- Lug width
- 18mm
- Case material
- Resin
- Case shape
- Rectangular
- Dial
- Grey
- Crystal
- Acrylic
- Movement
- Quartz
- Calibre
- 593
- Functions
- Day-date
- Water resistance
- Not water resistant
- Bracelet / strap
- Rubber strap
- Strap colour
- Pink
- Clasp
- Buckle
- Lume
- Luminous
- Retailer
- F.Hinds
Additional specifications
- Lug-to-lug
- 38.2mm
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 Vintage range (55), Back in Stock (5,241), Watches Under 37mm (1,830), Watches Under £100 (740), Rectangular & Square Watches (492) and Grey Dial Watches (266).
Temporarily out of stock
F.Hinds is not currently taking orders for this reference. Last listed as available on 13 September 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
Strengths
- 35.2mm suits most wrists
- 38.2mm lug-to-lug keeps the 35.2mm case wearable
- Luminous hands and markers for low light
- Sits in the lower half of Casio's range as we list it
Worth knowing
- Acrylic crystal marks easily, though it polishes out
Casio Vintage F-91WC-4AEF Digital Pink alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | F-91WC-4AEF | 6669G | 3134 |
|---|---|---|---|
| Price | £25 | £25 | £25 |
| Case size | 35.2mm | 34mm | 37mm |
| Water resistance | Not water resistant | — | 30m |
| Movement | Quartz | Quartz | Quartz |
| Strap | Rubber strap | Leather strap | Leather strap |
| This watch | Closely matched |
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
No. This watch carries no water resistance rating — keep it dry, and take it off before washing your hands.
Water resistance explainedWill 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.
Sapphire, mineral and acrylic comparedDoes it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Quartz, automatic and solar comparedWhat size strap does it take?
18mm. 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 38.2mm, which suits wrists from roughly 15cm (6 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 unisex, and at this size it suits any wrist that takes the dimensions.
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