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Casio WS-1600H-1AVEF Watch
The Casio WS-1600H-1AVEF is a men's digital watch measuring 45 x 42.1 mm, with a black resin case and strap. Its 3556 module integrates world time, a chronograph with total time function, 9 timers with preset times and auto-repeat, daily alarm, time signal and automatic calendar up to 2099. Water resistance is 10 ATM (100 metres) and the CR2025 battery offers approximately 10 years of autonomy.
The display is divided into three segments: an upper bar, a lower bar and a side circle. This layout allows the local time and world time to be seen at once, or the total time of a match and the time of a specific play. The chronograph measures in 1-second intervals and supports the TGT (total) function: a time limit is set, the watch counts the total elapsed time even when the chronograph is paused for an interruption, and it alerts when that limit is reached. This is the feature that has made it popular among referees and sports timekeepers.
The 9 timers are configured independently and accept preset times of 10, 12, 15, 20, 25, 30, 35, 40 and 45 minutes. They can be chained or looped, and auto-repeat is turned on or off depending on whether you want it to count again when it reaches zero or stop. Initial setup is not intuitive: the manual requires several steps to define each interval, and anyone unfamiliar with Casio digital watches will take a while to get the hang of it. Once learned, the system is versatile.
World time covers 48 cities in 29 time zones and is shown in one of the display segments while the other keeps the local time. The time format is set between 12 and 24 hours, daylight saving time is turned on or off from the menu, and the button tone can be silenced. Lighting is provided by two orange LEDs located in the upper corners: they illuminate the whole screen and activate instantly when the button is pressed. It is not uniform electroluminescent light, but it covers the entire screen without leaving a central blind spot.
The case design is octagonal, with straight lines and a plastic bezel painted in a metallic tone that recalls the Casio Royale (AE-1200). The pushers are metal, generously sized and with ridges that make them easy to operate, although they have no anti-slip treatment. The watch weighs 39 g and does not bulk up on the wrist: the resin case and strap of the same material, with a keeper loop, adjust without squeezing. The crystal is acrylic resin and scratches easily; it can be polished with Polywatch or a similar product.
The module includes a single daily alarm and time signal. It is not a limited edition: it is a regular production model, manufactured in China.
Digital 45 x 42.1 mm 39 g 10 ATM TGT Chronograph 9 Timers Dual LED
Why choose this watch?
42.1 mm and 39 g: the most compact digital
Compared with the WS-1800, the WS-1600H reduces case and weight. At 42.1 mm wide and 39 g, it is a watch that does not bulk up on a narrow wrist and that you forget you are wearing.
TGT chronograph for referees and timekeepers
The chronograph does not just count: it allows a total time to be set and plays to be paused without stopping the overall count. When the limit is reached, it alerts. This is the feature that sets it apart from other digital watches in the same range.
Dual LED that illuminates the whole screen
Two orange LEDs in the upper corners cover the entire screen instantly. It is not uniform electroluminescent light, but it leaves no central blind spot like other modules.
Octagonal case with a nod to the Casio Royale
The straight-lined case and the plastic bezel painted in a metallic tone recall the AE-1200. It is a design that is recognisable from a distance, without being an exact copy.
9 timers, but with a learning curve
The timers allow up to 9 intervals to be defined with preset times. Initial setup is not intuitive: it requires several steps per interval. Once learned, it is a versatile system for sets and sequences.
A single alarm: the module's limitation
Compared with other Casio watches with three or five alarms, the WS-1600H includes only one daily alarm and time signal. Anyone who needs several daily reminders should look at another model.
Technical specifications
Movement and functions
- Type: digital quartz.
- Module: 3556.
- Functions: hours, minutes, seconds, day of the week, date, world time, chronograph with TGT (total) function, 9 timers with preset times and auto-repeat, daily alarm and time signal.
- Chronograph: 1 second. TGT function: sets a total time, allows plays to be paused without stopping the count and alerts when the limit is reached.
- Timers: up to 9, with preset times of 10, 12, 15, 20, 25, 30, 35, 40 and 45 minutes. Auto-repeat on or off.
- World time: 48 cities, 29 time zones. Shown alongside local time in separate segments.
- Time format: 12/24 hours.
- Calendar: automatic up to 2099.
- Accuracy: ±30 seconds per month.
- Battery: CR2025, approximately 10 years.
- Button tone: on or off.
Case and dimensions
- Reference: WS-1600H-1AVEF.
- Brand: Casio.
- Collection: Casio Collection.
- Case material: resin.
- Case shape: octagonal.
- Bezel: plastic painted in a metallic tone.
- Dimensions: 45 x 42.1 mm.
- Thickness: 12.5 mm.
- Weight: 39 g.
- Pushers: metal, generously sized, with ridges. No anti-slip treatment.
- Water resistance: 10 ATM (100 metres).
- Manufacturing: China.
Display and lighting
- Display type: digital, three segments (upper bar, lower bar and side circle).
- Crystal: acrylic resin. Scratches easily and can be polished with Polywatch.
- Lighting: two orange LEDs in the upper corners. Illuminate the whole screen instantly, with no central blind spot.
Strap and presentation
- Strap material: resin.
- Strap colour: black.
- Clasp: buckle.
- Keeper loop: yes.
- Strap length: 145 to 215 mm.
Frequently asked questions
What is the TGT function of the chronograph?
It is a total time set in advance. When the chronograph is activated, the watch counts the elapsed time even if you pause the count for an interruption. When the set limit is reached, it alerts. It is useful for matches: the regulation time is set and the watch discounts stoppages for fouls without stopping the total time count.
How do the 9 timers work?
Each one is configured independently and accepts a preset time between 10 and 45 minutes. They can be chained (when one ends, the next begins) or looped. Initial setup requires several steps per interval and is not intuitive, but once learned it allows training sequences to be set up without reprogramming between sets.
Does the light illuminate the whole screen?
Yes. Two orange LEDs in the upper corners cover the entire screen. It is not uniform electroluminescent light, but it leaves no central blind spot. It activates instantly when the button is pressed.
Does the crystal scratch?
Yes. It is acrylic resin and scratches easily. It can be polished with Polywatch or a similar product, and surface marks disappear relatively easily. To avoid new scratches, avoid exposing it to abrasive surfaces.
Can I swim with it or does it only resist splashes?
The manufacturer declares 10 ATM, equivalent to 100 metres. That covers swimming in a pool and in the sea at surface level. Avoid pressing the buttons underwater and check the case back before each use.
How does it differ from the WS-1800?
They share 9 timers, world time, 10-year battery and a 1-second chronograph. The difference is in the format: the WS-1600H is smaller and lighter (42.1 mm wide and 39 g versus 45 mm and 41 g on the WS-1800) and its three-segment display is designed to read splits at a glance. The WS-1800 has a wider display but takes up more wrist space. If you want the most compact format, the 1600H; if you prefer a large display, the 1800.
