Longines HydroConquest 39mm Black Lacquered Polished
L3.779.4.56.6
- Case
- 39mm
- MSRP
- $2,200
- Movement
- Automatic
- Reserve
- 72h
VS
Building 1v1 comparison
Building 1v1 comparison
1v1 Watch Comparison
A focused side-by-side page for specs, fit, movement details, review notes, and enthusiast context.
L3.779.4.56.6
M7939A1A0NU-0001
Pair Review
Built from the saved specs and wearability notes for these two watches, then weighed against enthusiast priorities like fit, movement quality, practicality, finishing, value, and collector appeal.
Where it wins
Buyers who want the stronger value proposition and higher dive rating.
Where it wins
Enthusiasts who prioritize certification, anti-magnetic performance, and mechanical credibility.
Both are automatic dive watches, but the Tudor has the clearer technical edge. The Longines uses the L888.5 with a 72-hour power reserve and a silicon balance spring, which is a strong modern spec for its price. The Tudor uses the MT5400-U with a 65-hour reserve, plus COSC and METAS certification and 15,000 gauss magnetic resistance, which gives it stronger documented performance and anti-magnetic capability. Longines offers the longer reserve, while Tudor offers the more thoroughly certified and technically robust movement package. Winner: Tudor Black Bay 58
This is a close size match on paper: both are 39mm across and 11.7mm thick, with 20mm lugs. The Longines has a listed 48.1mm lug-to-lug and a 167g weight, so its footprint is known and its presence is clearly substantial but still compact for a dive watch. The Tudor’s lug-to-lug and weight are not yet listed, so its exact on-wrist footprint cannot be quantified here. In the wear notes, the Longines is described as wearing noticeably more compact than most 39–41mm divers, with improved comfort from its tapered bracelet and tool-less micro-adjust system. The Tudor is described as having excellent proportions, a slim-feeling case, and one of the easiest luxury dive watches to wear daily, with the T-Fit clasp adding real-world comfort. Based on the available data, the Longines has the more fully documented fit profile, while the Tudor is also clearly excellent but less fully specified. Winner: Tie
Both are highly capable daily wear dive watches, but they serve that role differently. The Longines offers 300m water resistance, a ceramic bezel, sapphire crystal with anti-reflective coating on both sides, applied indices with Super-LumiNova, a date display, and a highly polished black lacquer dial that reads as more dressy and versatile outside strictly sporty use. The Tudor counters with a matte black dial, domed sapphire crystal, applied hour markers, a T-fit clasp, and a more vintage-leaning steel/aluminum bezel combination. For practicality, Longines has the edge in raw dive spec, dial brightness, and broader smart-casual versatility; Tudor has the edge in refined bracelet ergonomics and a more understated, tool-watch aesthetic. Winner: Longines HydroConquest 39mm Black Lacquered Polished
The Longines is the clear value winner on listed MSRP: $2,200 versus $5,350 for the Tudor. That price gap is substantial, and the Longines brings a strong package of ceramic bezel, 300m water resistance, 72-hour reserve, and a refined bracelet/clasp setup that punches above its class. The Tudor carries stronger brand-cachet signals in the data through COSC and METAS certification, a 15,000 gauss rating, and a more elevated movement specification, which supports its higher price from an enthusiast perspective. On ownership practicality, both appear robust, but Longines offers the easier value proposition and more accessible entry into a modern Swiss luxury diver. The Tudor feels more collector-significant as a benchmark Black Bay variant, but the Longines is the better straightforward buy on the numbers provided. Winner: Longines HydroConquest 39mm Black Lacquered Polished
Compared
L3.779.4.56.6
M7939A1A0NU-0001