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G-Shock

Casio Men's Combi Watch Ga-100-1A1Er with G-Shock Resin Strap

4.6 out of 5 stars  See all reviews (207 customer reviews)
RRP: 100.00
Price: 69.99 & FREE Delivery in the UK. Details
You Save: 30.01 (30%)
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In stock.
Dispatched from and sold by Amazon. Gift-wrap available.
Want it tomorrow, 25 April? Choose Express delivery at checkout. Details
  • World Time
  • Stopwatch, 1/1000 Sec, 100 Hours
  • Countdown Timer,1/1 Min,24 Hours (With Automatic Repeat)
  • 5 Daily Alarms, One With Snooze
  • 200m Water Resistance

Special Offers and Product Promotions


Product Specifications

Watch Information
Brand Name G-Shock
Model number GA-100-1A1ER
Part Number GA-100-1A1ER
Model Year 2012
Item Shape round
Dial Window Material Type Mineral
Display Type analogue - digital
Clasp Type Buckle
Case Material Resin
Case Diameter 51.20 millimetres
Case Thickness 16.90 millimetres
Band Material Resin
Band Length Mens Standard
Band Width 22 millimetres
Band Colour black
Dial Colour black
Bezel Material Resin
Calendar day-date-month-year
Special Features alarm, light, stopwatch
Weight 70 grams
Movement Quartz
Water Pressure Resistance 20 bar
Warranty Type Manufacturer
Warranty Description 2 years


Product details

  • Product Dimensions: 5.1 x 1.7 x 5.5 cm ; 68 g
  • Boxed-product Weight: 399 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
    Find out more about our Delivery Rates and Returns Policy
  • Item model number: GA-100-1A1ER
  • ASIN: B0039NDB2O
  • Date first available at Amazon.co.uk: 10 Oct 2006
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (207 customer reviews)
  • Amazon Bestsellers Rank: 83 in Watches (See Top 100 in Watches)
  • Click here for information about recycling electrical and electronic products

Product Description

Product Description

Living up to G-Shock’s reputation for big case designs, comes a revolution in case size with the introduction of the X-Large G. This Ana-Digi, “three-eyed” phenomenon measures in at a whopping 55 x 51.2 x 16.9mm size, with an attention to detail that is second to none. Large anti-skid buttons provide easy operation, embossed indexes gives a 3-D look and a rivet bezel design adds strength to it's overall appearance.

Casio G-Shock

Casio G-Shock

A 10-year battery life, 10bar water resistance and 10 metre dropping shock resistance. These were the three requirements of the ‘Triple 10’ concept that led to the development of G-Shock’s shock-resistant structure. The rugged shape and robust styling originated with an engineer’s brief calling for an ‘unbreakable watch’.

Since its birth in 1983, G-Shock has continued its unrestrained evolution while retaining its unique structure and has continued to push forwards technologically too. It has produced versions that resist freezing temperatures, high water pressure, magnetic fields, centrifugal forces and radio-controlled technology that constantly makes sure they display the correct time wherever you are in the world.

It’s not just technology that’s been a strength for G-Shock over 30 years though. The G-Shock is also about functional beauty, and fashion-wise the brand has worked with renowned artists and tastemakers over the years to create some outstanding collaborations, including Maison Martin Margiela, Eminem and Maharishi to name but a few.



Customer Reviews

Most Helpful Customer Reviews
5 of 5 people found the following review helpful
4.0 out of 5 stars Great watch 19 April 2013
Verified Purchase
Great watch only problem is the light doesn't really display the digital clock but other than that 100% will recommended this watch to anyone.
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40 of 44 people found the following review helpful
5.0 out of 5 stars Casio G Shock Review 26 Oct 2010
I love this watch, bring it with me everywhere and it can take a knock.
I have worked with Dewalt hammer drills, building installations, and heavy gym work outs and this watch has been knocked about and still ticking.
Watch also looks great and feels solid
Would highly recommend.
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3 of 3 people found the following review helpful
5.0 out of 5 stars Love it. 11 Feb 2013
Verified Purchase
Good size, perfect weight, pretty fashionable and a great day to day user. In fact, I have a few more expensive watches, that now only come out on occasion...blame it on the "user friendly" lets go anywhere casio.
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2 of 2 people found the following review helpful
5.0 out of 5 stars Casio G-Shock 13 May 2013
By Btiarks
My Son 11 years old was over the moon to have this watch. My initial thought was if it would be too big as it is a men's watch but not all all. It fits perfectly and he is very proud of it. On his friend who has an even thinner wrist the mens size is perfect too.
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20 of 24 people found the following review helpful
5.0 out of 5 stars Classy and Sporty 7 Mar 2011
Different (all black) but discrete.
Rock-solid(it's a G-Shock!) but extremely light, nice for whoever likes seeing time in simultaneous analog and digital views.

Easy switching between 2 time-zones.

1/1000th 24hr chrono! (if you need that)

And what I have not tested, but don't doubt (because it's a Casio): 200m water resistant and 3 or 4 years autonomy...
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19 of 23 people found the following review helpful
5.0 out of 5 stars Great purchase 12 Jun 2011
By Chiloni
Very great purchase, I do not regret investing in this wrist watch at all. It is one of the good things that I have purchased this year. It is worth getting, anyone who has style and can afford it should definitely invest in it. It is everything, that is stated on its product description. ''
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10 of 12 people found the following review helpful
5.0 out of 5 stars Great Watch looks really smart 29 Jan 2012
This is a great watch and it looks amazing. All the people who say the backlight isnt good need to get a grip, the light is absolutely fine. Remember its a watch not a torch. I recommend this watch 5 stars!
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1 of 1 people found the following review helpful
1.0 out of 5 stars Out of Sync hands and digital timer 4 Dec 2013
Verified Purchase
Bought this watch last year and never been able to set the time correctly. In fact it has been a party piece with friends using or not the manual trying to set the correct time with none successful. The simple fact is the digital and analogue time are out of sync by 1 hour 40 minutes. As a life long G Shock owner I feel a little let down on a brand which I have found previously very reliable.
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Most Recent Customer Reviews
5.0 out of 5 stars Excellent watch
This watch is excellent for everyday use and is priced so low, you can't say no. The functions may not always be used but it looks great and having them there is a plus. Read more
Published 1 day ago by Farhaan Faruk
4.0 out of 5 stars Great watch
Love this watch, really chunky and hardwearing. The only down-side is the poor watch light as it isn't strong enough to display the time at night.
Published 8 days ago by Rich79
5.0 out of 5 stars good buy
I was very happy with the purchase of this watch. It came promptly securely wrapped and my son loves it.
Published 9 days ago by EL
5.0 out of 5 stars Great watch
Great watch, everything I was told it was
And more. I wear it for work everyday, and still looks good for wearing out of work.
Published 9 days ago by Trevor Hitt
5.0 out of 5 stars Not a G-Shock fanatic - but very practical and hard-wearing
Brought this watch for an every day, not worried if it gets knocked or wet etc type of watch. It does look slightly plastic (and is) but this jet black model still looks cool... Read more
Published 13 days ago by happy customer
5.0 out of 5 stars Great watch, great service!
Ordered Wednesday night and received today. Great watch with a tactical look and good size. People have mentioned it is hard to set the time and read the digital face, but it... Read more
Published 19 days ago by Amazon Customer
5.0 out of 5 stars Good purchase
Awesome watch for the price, looks good and works perfectly. Delivery occurred within the time promised and the watch was in perfect condition.
Published 22 days ago by Alister Colli
5.0 out of 5 stars Great watch, as expected.
Great watch, looks good, not brightly coloured and in your face like some G Shocks. Has all the spec I need, over sized face is cool. Read more
Published 1 month ago by ben
5.0 out of 5 stars Great watch and unbelievable price
I got the all black after sending back the white one...far too girly for me to wear... But the black is superb, very chunky but not silly massive like some are nowadays... Read more
Published 1 month ago by paul cam.
5.0 out of 5 stars Fantastic
Brought this for my 13 year old sons birthday, and the result is that he loved it. It has a adjustable strap so don't hesitate if you have a small wrist or buying for a younger. Read more
Published 1 month ago by Nikhil
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