The Seiko SKJ031 (5M43-0A40) is a 42mm men’s kinetic watch with a stainless steel case and a blue analog dial protected by sapphlex crystal. It uses a 5M43 caliber quartz movement that cannot be manually wound but can be hacked (the second hand stops when the crown is pulled out). The watch should run for up to 14 days when fully charged and will recharge when moved.
The case of the SKJ031 measures approximately 42mm wide (not including the crown) by 12mm thick and is water resistant to 200 meters. This should be sufficient for splashes, rain, baths, showers & swimming (shallow diving) but is not recommended for scuba diving.
The crown screws down to help prevent it from being accidentally pulled out while under water. The stainless steel bezel shows minute numbering and can be rotated. The gap between the lugs is 22mm and the bracelet band can be adjusted to fit using a link removal tool or removed using a band removal tool to be replaced with another band.