Citizen’s Flagship Dive Watch Is on a Whale of a Sale for Amazon’s Big Spring Sale

As vacation essentials go, the perfect summer watch ranks right up there with your choicest sandals, sunglasses, and swim trunks. Not unlike the best fitness watches and the best formal watches, the right summer watch is a carefully calibrated blend of style and function, with a palette that will complement your biggest seasonal fits and a design that’s equally suited to sun and sand as kicking back on a patio. Citizen’s Promaster Dive watch delivers that to a tee, and at less than $250…