This is 1521 Militaire series Squale dive watch with a 42mm Blasted 316L stainless steel case with a screw-in back. The black dial features larger indexes with double the amount of SuperLuminova on the hour markers and hands. Includes a uni-directional snap-on bezel with sixty-minute markings. The SuperLuminova PIP is protected via a sapphire glass guard. Includes a scratch-resistant flat sapphire crystal. Comes on a fitting blasted Squale Mesh!