Casio Vintage AQ-240E-7AEF vs Timex Marlin Quartz GMT 40mm TW2Y47900: which should you buy?
Both track a second time zone on a budget, in very different ways. The Casio AQ-240E costs £54.90 RRP and puts home time on a small LCD under analogue hands, with an alarm and stopwatch. The Timex Marlin Quartz GMT costs £180 RRP and uses a proper red-tipped 24-hour hand in a 40 mm steel dress case. Pick on looks and budget.
Pick the Vintage AQ-240E if
Pick the Casio AQ-240E if you want the cheapest, slimmest way to keep two times on your wrist, plus an alarm and stopwatch, and don't mind resin.
Pick the Marlin Quartz GMT 40mm if
Pick the Timex Marlin Quartz GMT if you want a real 24-hour GMT hand, a steel case and a smarter mid-century look for the office.
How do they compare side by side?
| Spec | Vintage AQ-240E | Marlin Quartz GMT 40mm |
|---|---|---|
| Brand | Casio | Timex |
| Reference | AQ-240E-7AEF | TW2Y47900 |
| Case diameter | 35.8 mm | 40 mm |
| Thickness | 8.1 mm (better) | 13 mm |
| Lug to lug | 40.9 mm | Not stated |
| Movement | Quartz | Quartz |
| Calibre | Casio module 5154 | Ronda 515.24H |
| Crystal | Resin | Domed acrylic |
| Strap | Stainless steel bracelet with adjustable clasp (fits 150 to 205 mm wrists) | Blue LWG-sourced leather, 20 mm, quick-release spring bars, buckle |
| Colourway | Silver sun-ray dial, silver-tone case and bracelet | Blue sunray dial, polished stainless steel case, gold-tone hands and markers, red-tipped GMT hand |
| Launched | October 2025 | August 2025 |
| Brand RRP | £54.90 (better) | £180 |
| Water resistance | Not stated | 50 m |
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A dot marks the better spec, where "better" is clear-cut (more water resistance, longer power reserve, a harder crystal). Specs from each brand's published information.
Read the first looks: Casio Vintage AQ-240E-7AEF · Timex Marlin Quartz GMT 40mm TW2Y47900
Questions people ask
Is the Casio AQ-240E a real GMT watch?
It tracks a second time zone, but on its digital display rather than with a 24-hour hand. The Timex Marlin uses a traditional GMT hand.
Which is better for swimming?
The Timex, which is rated to 50 m. Casio gives no depth rating for the AQ-240E and calls it splash-proof, so keep it out of the pool.
Which is easier to change when you travel?
The Casio's digital second zone is quick to adjust from its buttons. The Marlin is a caller-style GMT, so jumping the local hour is more fiddly, according to its spec.