Serket Watch Co. has announced a limited-time flash sale for the Reef Mariana dive watch collection. For a duration of 24 hours, customers can receive $100 off the standard retail price by using the discount code REEF100 at checkout. This promotion brings the price of the timepiece down from its normal MSRP of $349.00 to $249.00. The Reef Mariana is a 40mm professional-grade dive watch featuring a robust set of specifications. Each model is constructed with a 316L stainless steel case, a sapphire crystal, and a ceramic bezel insert. The watches are powered by an automatic movement and provide water resistance up to 200 meters. The sale covers several colorways within the Mariana lineup. Available configurations include a black dial with either a black or green bezel, a blue dial with a matching blue bezel, and an orange dial paired with either a black or green bezel. The brand, based in Denver, Colorado, positions the watch as a serious tool for underwater exploration offered without traditional luxury markups.