Mens Casio G-Shock Military Black Alarm Chronograph Watch GD-400MB-1ER


Casio logo


10+ in stock


£110.00 £96.00
(with 25% code £72.00)
We Price Match!
We Price Match!
Seen it cheaper?
Submit a request
4.91/5 Based on 33 customer reviews

Order within 2 days, 6 hours and 28 minutes to get it Tuesday 14th July


Casio G-Shock Military Black GD-400MB-1ER is a functional and very impressive Gents watch. Material of the case is Stainless Steel and Resin and the LCD dial gives the watch that unique look. The features of the watch include (among others) a chronograph and date function as well as an alarm. This model has got 200 metres water resistancy - it can be used for professional marine activity, skin diving and high impact water sports, but not deep sea or mixed gas diving. The watch is shipped with an original box and a guarantee from the manufacturer.

  • Brand: Casio
  • Gender: Gents
  • Model Name: G-Shock Military Black
  • Movement Source: Japanese
  • BARCODE: 4971850055709
  • Guarantee: 2 years
  • Packaging: Casio packaging
  • MPN: GD-400MB-1ER
Share this product
This watch is supplied with:
  • Official Casio presentation box
  • Official Casio guarantee
  • Instruction manual (where applicable)
This product can be shipped to:
  •   UK (United Kingdom)
  •   EU (European Union)

View shipping destinations

We Price Match!
Seen it cheaper?
Submit a request
See a mistake on this page? Please let us know

Size and Fit

  • Case depth approx.: 15.00mm
  • Case width approx.: 48.00mm

Features and Functions

  • Alarm: Yes
  • Backlight: Yes
  • Chronograph: Yes
  • Movement: Quartz

Materials and Care

  • Analogue/Digital: Digital
  • Primary Material: Stainless Steel and Resin
  • Case Shape: Circle
  • Clasp type: Strap buckle
  • Dial Colour: LCD
  • Strap colour: Black
  • Strap Type: Rubber Strap
  • Water Resistance: 200 metres

Ratings and Reviews

Own this item? Click here to write a review

Average rating: 4.91 / 5
Other independent review sources

Avsj | Mon 21st January 2019 |

I have broken every watch I have ever owned , from straps to the screen so was a bit reluctant to spend the out for this watch , but I did and blow me it hasn't broken . I have dropped it of the landing , squashed it between cages ,battered it against shelves and it is still going I'm beginning to think it is indestructible . it still looks like new 6 months down the line , I'm so glade I bit the bullet and got it . I love the look style and the fact it makes one of my work mates jealous as he keeps being cheep knock offs that fall apart lol . Only 1 down side is the screen can be a bit dark and hard to read ,but thay put the back light on and boom problen solved . I would 100% recommend this watch to any one who is thinking about getting one

40 out of 89 people found this review helpful
Was this review helpful to you?
Yes    No   
Robyn | Mon 9th April 2018 |

Lovely watch, came well wrapped and in good time. Very well protected and the product is excellent,

81 out of 165 people found this review helpful
Was this review helpful to you?
Yes    No   
Dave Lockin | Fri 27th April 2018 |

Excellent item as you would expect from a G Shock. If this was my only watch I would find it frustrating that the time can be difficult to read in some light situations, however this watch is as much about the design and the features as it is about function. I couldnt be happier and the service from watchshop was excellent as always!

89 out of 173 people found this review helpful
Was this review helpful to you?
Yes    No   
Brad | Mon 12th March 2018 |

Great watch, very comfortable to wear. was a bit worried that it would look to big but absolutely fine. Looks good in stealth black with the green display. great value for money.

88 out of 169 people found this review helpful
Was this review helpful to you?
Yes    No   
Mark | Sun 18th February 2018 |

Was looking for a durable watch for work , g shock ticked all the right boxes , lightweight , accurate and very robust. The GD400 model fitted all the specs that I was looking for and with the military themed all black and negative screen with green digit numbers fits my line of work perfectly. Highly recommended and the watch is even getting more wrist time than a lot of my other more expensive automatic divers watches even been wearing it out of work.

86 out of 173 people found this review helpful
Was this review helpful to you?
Yes    No   
John | Wed 31st January 2018 |

The watch itself is exactly what i expected sturdy, looks good and fit for the military use.

100 out of 198 people found this review helpful
Was this review helpful to you?
Yes    No   
Mr Taylor | Sun 7th May 2017 |

I was recently looking for a new watch for work that can take a serious beating. Ive always had a preference for automatic and mechanical watches but seeing as i have just changed my job to a very physical and demanding job i needed a new watch for the job.
So I ordered a Casio G Shock GD400 it has everything I need from different time zones and several alarms which I do use daily even the time zones to make sure i dont contact family members abroad at an inappropriate hour, with hourly time chime marker which comes in handy.
The watch also has five alarm functions world time zones an auto light function that once set stays on for 6 hours then auto shuts off to save the battery life which is a nice touch.
All in all an ideal watch for anyone in military fire police or paramedic services.
Pros- Robust
Light weight
5 Alarm functions
World time zones
Auto light function
Protection bull bars
200 meters waterproof

Cons- Light display not very bright
No solar power
No mud protection

Conclusion a great watch for demanding jobs
if it was solar powered and had mud protection
it would be perfect but thats me being picky, if you need a watch for very demanding jobs buy this you will not be disappointed!

77 out of 156 people found this review helpful
Was this review helpful to you?
Yes    No   
FRP | Wed 12th April 2017 |

Bought as a gift for my partner. He uses the watch for work and loves it! Hes had loads of comments for colleagues! Very sturdy watch!

88 out of 157 people found this review helpful
Was this review helpful to you?
Yes    No   
Andrzej | Sat 25th February 2017 |

Go ahead, buy this watch!

I absolutely love this watch. Took about half hour to work through the small type setup guide, was able to program without a hitch. Im hard on watches, and I like the protective roll cage over the crystal. Love the green on black display. Easy to read in sunlight, stealthy in the dark. Thats the point. The auto light function turns the LED illuminators on for up to 3 seconds when you rotate your wrist to read the display in the dark. Its a big chunky watch but not heavy on the wrist. Price is right. Very suitable for military or tactical use.

94 out of 193 people found this review helpful
Was this review helpful to you?
Yes    No   
Ben | Sat 7th January 2017 |

First time using watchshop and Ill be using them again.the service was spot on from start to finish.good communication via email.good dispatch and delivery time even over the busy xmas period,watch as described.very happy

86 out of 169 people found this review helpful
Was this review helpful to you?
Yes    No   

View more

About Casio

Casio logo


Legendary Japanese electronics company Casio is loved for its range of innovative and reliable watches. Casio offers both analogue and digital watches for men and women in a variety of styles and colours, perfect for everyday wear, sportswear more adventurous activities. The G-Shock and Baby-G watches are perfect for keen sportspeople, thanks to their durability, excellent time keeping and advanced sports features. Meanwhile, the classic unisex Casio watch adds a little retro flair to any outfit. Though simple, the design is iconic, and an absolute must for any watch lover's collection. Available in gold, rose gold, black and silver, there's a colour to match any style. The brand also produces a range of high-quality, professional watches ideal for those who lead an adventurous lifestyle. The premium pieces are mud and water resistant, and include accurate compasses to help keep you firmly on the trail. Explore the full range of Casio's analogue & digital watches, keep it classic with the Casio gold watch collection or browse their feature rich selection of sports watches.

Watch Shop is an authorised Casio stockist.

Love Casio?

Sign up to receive email updates when new styles of Casio are added to Watch Shop!


Finance Summary
2-Months 3-Months
Cash Price: 0 0
Payment 1 (today): £00.00 £00.00
Payment 2 (month 1): £00.00 £00.00
Payment 3 (month 2): £00.00 £00.00
Payment 4 (month 3): - £00.00
How Openpay works

Interest-free payment plans that allow you to spread the cost over equal monthly payments.

Just select Openpay at the checkout, on purchases between £20.00 and £2,000.00.

There are no long forms to complete and you get an instant decision online.

No need to wait. Your goods will be shipped once your application has been approved.