A resin case is what the Casio GMD-S5600-1ER is built around, in a generously sized case. It measures 40 mm across. Case and Wrist Presence \n Case diameter is 40 mm, worked in resin. At 40 mm it lands in the range most men’s wrists take comfortably, and it will sit under a cuff. \n Movement and Functions \n A quartz movement drives the watch. That means accuracy which needs no daily attention, no winding routine, and no rate drift to correct. \n \n Multifunction – several indications on one dial \n Water resistance – 20 ATM (200 metres) \n Mineral crystal – protecting the dial \n \n Strap, Clasp and Fit \n The strap is resin. \n Water Resistance and Everyday Durability \n The watch is rated to 20 ATM, or 200 metres of static pressure. In practical terms that covers rain, hand washing, showering and recreational swimming. It is not a dive watch, so leave it behind for scuba diving and keep it away from high-pressure water jets. Make sure the crown is fully seated before any contact with water. \n A mineral crystal protects the dial – harder than acrylic and more shatter-resistant than sapphire, which is a sensible trade-off on a case this size. \n Who This Watch Suits \n \n An everyday wrist size that still reads as a proper men’s watch \n Daily wear that includes rain, washing up and the occasional swim \n Gift buyers looking for something recognisable, boxed and properly warranted \n \n Care and Maintenance \n None of the care below is onerous. It is the difference between a watch that ages well and one that simply gets old. Have the battery replaced by a watchmaker rather than a kiosk – a proper service reseats the case gasket at the same time, which is what actually preserves the water rating. A flat battery left in the case is the single most common cause of avoidable movement damage. Rinse the case in fresh water after a swim, especially in the sea, and dry it before it goes back on. \n Keep it clear of perfume and solvents, off the speaker on your desk, and out of direct sun when you take it off. \n About the Brand and Ownership \n Casio watches sit in the sweet spot between fashion and function: recognisable design, real build quality, and a price that does not ask you to think of the watch as an investment. Quartz keeps the running costs near zero – a battery every few years and the occasional seal check is the whole of the maintenance schedule. Basic care goes a long way – keep it clear of solvents and perfume, rinse the strap if it has been in salt water, and store it somewhere dry. \n The Short Version \n What you are getting is an everyday size that still has presence. It is not trying to be a heirloom piece and it does not price itself like one. It is a well-made, recognisable watch that does the job every day and looks considered doing it. \n Technical Specifications \n \n Attribute Specification \n Brand Casio \n Model / Reference GMD-S5600-1ER \n Gender Men’s (40 mm case) \n EAN 4549526345180 \n Case Diameter 40 mm \n Case Material Resin \n Crystal Mineral \n Movement Quartz \n Strap / Bracelet Resin \n Water Resistance 20 ATM / 200 metres \n Warranty 24 months \n \n Buying With Confidence \n Buying a watch online comes down to trusting the seller, so here is exactly what you get. The watch ships new and unworn in its original box with the manufacturer’s paperwork, and it is covered by the full international warranty from the date you receive it – not from the date it landed in our warehouse. Delivery is countrywide, tracked from the moment it leaves us. \n Under the Consumer Protection Act you have the right to return an unworn watch in its original packaging, and a manufacturing defect inside the warranty period is repaired or replaced at no cost to you. \n Authenticity, Warranty and Delivery \n Every Casio watch we list is sourced new and unworn through authorised distribution and arrives in its original presentation box with the manufacturer’s documentation. This reference carries a 24-month international