Squale 1521 is a product category that takes its name from the original production reference that Von Büren gave to this case back in the 1960s. It is the iconic collection of the Squale brand, designed and built by Charles Von Büren at a time when diving watches were just beginning to appear. The collection features a screw-in case back, and a 316L stainless steel case that is a modern 42mm x 14mm size for a nice presence on your wrist. The one-way, 120-click non-slip ridged bezel guarantees maximum safety during diving: this allows you to adjust the time with maximum precision by aligning the triangle of the bezel to the desired minute. The minute hand is most important for a diver, as it allows you to monitor the minutes spent underwater, essential information to be able to accurately calculate decompression times during ascent. For this reason it is essential that it is easily distinguishable from the other hands due to its unique color. The choice of orange is not accidental: it is in fact the color that is best seen in low light conditions with poor visibility. The collection includes various models such as Full Luminous Militaire, Classic Mesh, and Classic COSC.