This professional diver's watch is the Squale 1521 Militaire Blast model. It features a black dial with printed indices for clear and precise time-telling in all lighting conditions. The watch is built with a 42mm stainless steel case, a stainless steel bracelet, and a sapphire crystal. It is powered by an automatic mechanical Sellita SW 200-1 movement.

Case
The case is made of 316L stainless steel with a diameter of 42 mm. The thickness is 12.5 mm, and the lug-to-lug length and lug width are 48 mm and 20 mm, respectively. The screw-down caseback and crown ensure enhanced water resistance.

Movement
The watch is powered by an automatic Sellita SW 200-1 movement with a 38-hour power reserve. It operates at a frequency of 28,800 alternations per hour (4 Hz) and contains 26 jewels.

Crystal
The crystal protecting the dial is made of sapphire, a material known for its high scratch resistance. It is flat and has an anti-reflective coating to improve legibility.

Bezel
The bezel is unidirectional and features a stainless steel insert.

Dial
The dial is black with printed indices. Its readability in the dark is guaranteed by SuperLuminova C3 luminescence.

Bracelet
The bracelet is made of stainless steel with a black finish. The lug width is 20 mm, and the buckle measures 18 mm.