The sports series have been part of Longines' portfolio since 2007. The timepieces in the HydroConquest and Conquest series were made with athletes and lovers of sporty wristwatches in mind, and are powered by automatic mechanical or highly precise quartz movements. The HydroConquest is a diving watch waterproof to 300 m (30 bar) with a unidirectional bezel and screw-down crown. There is also a chronograph version available. Even in the dark, it's easy to read this timepiece, seeing as the hands and numerals are coated with Superluminova. Bicolor stainless steel and gold-plated versions are also available.

You can purchase a pre-owned three-hand quartz Longines HydroConquest for less than 500 euros. New diving watches from this collection are available for around 600 euros. A quartz chronograph costs around 800 euros pre-owned and 1,000 euros new. If you prefer an automatic caliber, you should plan on spending at least 750 euros for a pre-owned timepiece or around 800 euros for a new one. Prices for pre-owned automatic chronographs with a metal bracelet start at 1,100 euros, and new watches cost 1,300 euros.

HydroConquest Features Diving watch with a unidirectional rotatable bezel

Quartz or automatic caliber

Also available with a chronograph function

The Conquest series consists of chronographs, three-hand watches, and GMT watches. GMT watches display a second time zone, a feature which is helpful for frequent fliers who always want to know what time it is at home. Chronographs function as timers, some of which can time to 1/100th of a second. The Horse Racing, Alpine Skiing, and Roland-Garros models are dedicated to horse racing, skiing, and tennis, respectively; all sports in which Longines timepieces are actively used. These three quartz watches are so precise that they can time to 1/100th of a second. New, the timepieces cost around 950 euros.

Longines was a pioneer in quartz watch technology. They developed their first quartz watch by 1954 and set chronometric records. Towards the end of the 1960s, they introduced the Ultra-Quartz series, which was composed of electronic wristwatches. The current Conquest V.H.P. model follows in the same tradition. The abbreviation V.H.P. stands for "very high precision." The timepiece lives up to its name; it only deviates from the correct time by five seconds a year. It also features a perpetual calendar and a gear position detection system which independently corrects the position of the hands if they move due to magnetism or a jolt. The battery life lasts for around five years, beating out traditional quartz watch batteries by about 24 months. The price for a new Conquest V.H.P. starts at 900 euros.