Description
The Longines HydroConquest 39mm represents the pinnacle of dive watch engineering, combining contemporary design with exceptional durability. This timepiece features an exclusive L888 automatic calibre, a self-winding mechanical movement beating at 25,200 vibrations per hour with a monocrystalline silicon balance-spring for superior precision and reliability. Built for performance, the watch delivers an impressive 72-hour power reserve and boasts water resistance to 30 bar (300 metres), making it equally at home in the boardroom or beneath the waves. The frosted blue sunray dial catches light beautifully, while the black ceramic unidirectional bezel, screw-in crown, and screw-down case back ensure maximum protection and functionality. At just 11.70 mm thick and weighing approximately 155 grams, this 39 mm gents watch strikes the perfect balance between presence and wearability. A complete package of style, substance, and Swiss watchmaking excellence.
Features:
Calibre: L888
Movement: Self-winding mechanical movement beating at 25'200 vibrations per hour, with a monocrystalline silicon balance-spring
Power Reserve: Approx 72 hours
Functions: Hours, minutes, seconds and date
Dial: Frosted blue sunray
Bezel: Black ceramic, unidirectional rotating
Crown: Screw-in crown
Thickness: 11.70 mm
Product Weight (Approx.): 155.0 g
Longines Watches are also available in our Ipswich and Windsor stores.
Specification
Shipping & Returns
We are proud to offer free UK delivery on orders of £101 and over placed on our website. Robert Gatward Jewellers currently only operates and supplies within the United Kingdom.
Orders placed before 12pm Tuesday–Friday will be dispatched the same day (stock permitting). Orders placed after 12pm on Friday through to Monday will be dispatched on Tuesday. If there is a specific day you would like to receive your order, please let us know as soon as you have placed it and we will do our best to accommodate.
Orders totalling £101 or more will be posted using Royal Mail Special Delivery. Orders totalling less than £101 will be posted using Royal Mail 1st Class Signed For Delivery (1–2 working days). Although next‑day delivery cannot be guaranteed with this service, the majority of these orders arrive the following working day, including Saturdays in many cases.
For delivery information regarding Engagement Rings, please click here.


