Squale Sub-39 is a product category that was created to celebrate sixty years of the Squale brand. The collection features a wide range of watches, all inspired by the past. All the models in the Sub-39 collection are different because each one is inspired by a watch design from the past. The element that unites them all is the case back with a diameter of 39 millimeters, or 40.3 millimeters if we consider the protruding bezel. All the other features, however, differ from one model to another, from the dial construction technique to the bezel material. The collection includes various models such as SuperBlue, GMT Vintage Blue, and GMT Vintage.