Hands-On Longines' HydroConquest Gets Slimmer And Slinkier

Photos by TanTan Wang and Longines Australia

Let's not bury the lede: this is a top-to-bottom redesign. The HydroConquest you've known since 2018 — big Arabic numerals, chunky crown guards, the slightly unwieldy 43mm option — is gone. What Longines is giving us for 2026 is a collection that borrows heavily from the DNA of the well-received HydroConquest GMT from 2023, and in doing so, makes a pretty compelling case for itself as one of the sharpest diver propositions at its price point.

Let's run through some specs. Two diameters are now available, 39mm and 42mm, both in stainless steel and measuring a genuinely impressive 11.7mm thick (or should that be thin?) The crown guards are gone — a cleaner, more contemporary silhouette has taken their place — and the overall aesthetic is tidier and more confident than its predecessor.

On the dial, the divisive Arabic numerals at 12, 6, and 9 have been replaced by a cleaner arrangement of rhodium-plated applied indices — triangular at 12, circular at 6 and 9, rectangular batons everywhere else. It's a more balanced look, and practically speaking, the larger surface area of the new indices means more Super-LumiNova, which translates to better low-light legibility.

You get four dial options: lacquered polished finishes in blue, black, and green, plus a frosted-blue sunray dial that shifts character depending on the light. That last one is gorgeous, and appropriately, it's the dial Longines has made boutique- and e-commerce-exclusive (as well as the watch they've plonked on ambassador Henry Cavill's wrist for its marketing campaign). Paired with a dark-blue ceramic bezel, it feels a cut above the core range. Henry picked well.

Speaking of bezels, there are five ceramic colours to play with: classic black, blue, and slate grey, joined by two new arrivals — green and "luminous blue". The bezel mechanism itself has been upgraded, borrowed from the UltraChron Diver, and it's a marked improvement from the previous generation. A Super-LumiNova capsule sits at the zero marker for visibility in low-light conditions.

Under the closed caseback sits the Longines-exclusive calibre L888.5, a tweak of the movement that previously powered the HydroConquest and the same beating heart found in the significantly pricier Legend Diver. This 'ETA-but-better' movement beats at 3.5 Hz and boasts a 72-hour power reserve, featuring a silicon balance-spring that makes it ten times more resistant to magnetic fields than ISO 764 requires. Water resistance is 300 metres, secured by a screw-in crown and a sapphire crystal with multi-layer anti-reflective coating on both sides.

Sometimes, focusing too much on a watch being a value proposition can be damning it with faint praise. It can also be lazy journalism. But the updated HydroConquest really does represent great value – and watch lovers have noticed. Commentary online from enthusiasts has been extremely positive, marvelling at how Longines has produced such a compelling package for the money.

Having spent a bit of time with the new HydroConquest during Longines’ Australian launch event for the watch last week in Byron Bay, I’ve got three main takeaways. Firstly, Longines has nailed the sizing. I’ve got 19cm wrists, so I can certainly pull off the 42mm model, but the 39mm is the pick of the two: it’s just a great package. Both models are also impressively slim, making it quite an easy-to-live-with tool watch.

Secondly, the bracelets are great. The three-link bracelet has been adroitly executed: it too is surprisingly thin, and the taper gives it a quiet elegance. The Milanese, however, is a more exciting prospect and has immediately drawn comparisons to recent Omega Seamaster Diver 300M novelties on Milanese.

Its design is an interesting compromise: the last few centimetres of the bracelet before the folding clasp actually consists of links with a stamped mesh pattern that can be removed in order to more accurately size the bracelet – which is typically a challenge with Milanese bracelets. This represents a win for consumers (as well as boutique staff!): it’s not the prettiest solution, but it’s quite a customer-friendly solution. There’s also an almost vintage charm to it, too – it reminds me of a Spiedel bracelet my grandfather used for his Eterna Centenaire, which had a stamped beads-of-rice effect. Both bracelets use the same folding clasp, which also stands out for its quality. It’s machined quite nicely, and the micro-adjustment system is above average.

Lastly, colours. Longines has been deft with each colourway of the HydroConquest. Highlights for me include the black dial model with a subtly slate grey bezel, and the ice blue Longines boutique/e-com exclusive, which gives off big Tiffany blue vibes without perfectly matching the hue. The ceramic bezel inserts look and feel very premium, and the bezels are pleasantly clicky to adjust.

My only real complaint about the new HydroConquests – which is something I’ve felt about the previous generation, too – is that they’re very Rolex Submariner-esque. A lot of dive watches are. Losing the oversized numerals has made the HydroConquest look less cheap, but it’s also made it look less unique. The green colourway in particular feels very Hulk-y. However, I recognise that for many consumers, this visual similarity to one of the most famous and coveted watches of all time (which is also 5 times the price of the Longines) will actually be a selling point. And for those who find that it isn’t a selling point, opt for the Milanese, and you’ll have a watch that’s more aesthetically distinct.

For more information, visit Longines online.