Watch A
Longines Conquest
Round · 41mm · 49.1mm lug-to-lug
Optimal proportions for most wrists
Case: 41mmLug-to-lug: 49.1mmBand width est.: 20mm
Open this size in the full fit chart →Longines Conquest vs Longines HydroConquest
Side-by-side comparison of specifications and features
Key Differences
Best Value
Longines HydroConquest (Ref. L3.781.4.96.6)
Starting from $1,299
Best Water Resistance
Longines HydroConquest (Ref. L3.781.4.96.6)
300m (3x more)
Biggest Price Drop
Longines HydroConquest (Ref. L3.781.4.96.6)
-3.9% in 30 days
See Both Watches on Your Wrist
Set your wrist circumference to compare relative case presence. Lug-to-lug is included when the catalog has it.
Medium (6.7″)
Balanced
Watch B
Longines HydroConquest
Round · 41mm · 47.5mm lug-to-lug
Optimal proportions for most wrists
Case: 41mmLug-to-lug: 47.5mmLug width: 21mmThickness: 12.2mm
Open this size in the full fit chart →Proportional guide only: wrist shape, strap articulation, bezel design, and case curvature change how a watch actually wears.
Price Comparison
Longines Conquest
MSRP
$2,000
New
$2,077
Used
$1,808
Longines HydroConquest
MSRP
$1,600
New
$1,640
Used
$897
MSRP New (Amazon) Used (eBay)
Side-by-Side Specs
Start with the specifications that meaningfully differ. Expand the complete table for reference details and missing-data context.
| Specification | Longines Conquest | Longines HydroConquest |
|---|---|---|
| Pricing | ||
| MSRPHydroConquest is $400 less at MSRP | $2,000 | $1,600 |
| New PriceHydroConquest is $437.4 less based on the current snapshot | $2,077 | $1,640 |
| Used Price (Low)HydroConquest is $910.8 less at the low end | $1,808 | $897 |
| Used Price (High) | $2,277 | $2,824 |
| 30-Day Trend | ↑ +16.9% | ↓ -3.9% |
| Used Price Range | $1,808 - $2,277 | $897 - $2,824 |
| Identity | ||
| Style | Sports, Casual | Diver, Sports |
| Dimensions | ||
| Thickness | N/A | 12.2mm |
| Lug to Lug | 49.1mm | 47.5mm |
| Case | ||
| Water ResistanceHydroConquest adds 200m water resistance | 100m (recreational diving) | 300m (diving) |
| Bezel | Fixed | Unidirectional rotating |
| Dial | ||
| Dial Color | Black/Blue (varies) | Blue |
5 specifications both watches share
Diameter41mm
MovementAutomatic
Case MaterialStainless Steel
CrystalSapphire Crystal
Luminous✓ Included
1 field is excluded from the differences view because one watch lacks comparable data. Use “All specs” to inspect those gaps.
Which Should You Buy?
If you are deciding between Longines Conquest and Longines HydroConquest, the real decision is usually about water-ready utility versus dressier everyday wear, sports character versus diver versatility, entry price versus premium finishing or specs. Treat it as a value-versus-upgrade decision — confirm the extra spend solves a problem you will notice every week.
Bottom line
Longines Conquest is the better one-watch choice for most people because its cleaner 41mm design moves from work to weekends more easily. Choose Longines HydroConquest when you will use a rotating dive bezel, stronger low-light visibility, and 300m water resistance.
Choose Longines Conquest when
Longines Conquest is a better fit for mechanical-watch enthusiasts, sports styling.
Choose Longines HydroConquest when
Longines HydroConquest is a better fit for mechanical-watch enthusiasts, diver styling.
Key Differences
Movement and upkeep
Longines Conquest: automatic movement
Longines HydroConquest: automatic movement
Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.
Size and wearability
Longines Conquest: 41mm · L2L 49.1mm
Longines HydroConquest: 41mm · L2L 47.5mm
Their size profiles are relatively close, so fit comes down to shape, weight, and how each watch sits on your wrist.
Water resistance
Longines Conquest: 100m
Longines HydroConquest: 300m
Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.
Price and value
Longines Conquest: $2,000
Longines HydroConquest: $1,299
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Style and use case
Longines Conquest: sports
Longines HydroConquest: diver
Longines Conquest leans more sports, while Longines HydroConquest pulls toward diver use case — pick the one that matches how you will actually wear it.
Crystal and materials
Longines Conquest: sapphire crystal · steel
Longines HydroConquest: sapphire crystal · steel
Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.
Choose Longines Conquest If...
- You want the more versatile design for work, weekends, and dressier use.
- You need everyday water resistance but not a dedicated dive-watch bezel.
- You are specifically shopping for a sports style watch.
Choose Longines HydroConquest If...
- You want a purpose-built dive watch with 300m water resistance and a timing bezel.
- Tool-watch legibility matters more than fitting naturally into dressier settings.
- Swimming, beach use, or tougher daily wear is part of the plan.
Price and Value Notes
Longines HydroConquest is often the value play at current pricing, while Longines Conquest makes more sense if you will use its extra features regularly.
There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.
Where to Check Deals
Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.
Check current deals on Amazon and eBay
Prices change often, so compare the latest listings and condition options before you buy.
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Longines Conquest
Check Price on AmazonOpens in new tab · Price may vary
Check Price on eBayFrom $2001 · New & used listings
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
Longines HydroConquest
Check Price on AmazonOpens in new tab · Price may vary
Check Price on eBayFrom $1299 · New & used listings
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
Comparison FAQ
Which one is better for smaller wrists?
Longines HydroConquest — it is 47.5mm lug-to-lug versus 49.1mm, and lug-to-lug is what decides whether a watch overhangs a smaller wrist.
Which is better for swimming or rough daily wear?
Longines HydroConquest — it is rated 300m versus 100m. Both are in the same broad bracket, so treat this as a tiebreaker rather than a deciding factor.
Is the more expensive one worth it?
Longines HydroConquest is the value pick at roughly $701 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.
Evidence & Method
How we compared these watches
Evidence reviewed July 19, 2026No WatchCompared hands-on test claimed
- • Catalog specifications are normalized into the same units before differences are calculated.
- • The verdict uses only populated fields and the source-backed observations listed here.
- • Missing evidence reduces the depth of the conclusion instead of being filled with assumptions.
View 2 evidence sources
- Named reviewer observationlongines.comReference: Longines Conquest · Longines HydroConquestChecked: July 19, 2026Limitation: Supports the attributed reviewer observation; WatchCompared did not reproduce the reviewer’s test.
- Named reviewer observationlongines.comReference: Longines Conquest · Longines HydroConquestChecked: July 19, 2026Limitation: Supports the attributed reviewer observation; WatchCompared did not reproduce the reviewer’s test.
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Longines Conquest
Check Price on AmazonOpens in new tab · Price may vary
Check Price on eBayFrom $2001 · New & used listings
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
Longines HydroConquest
Check Price on AmazonOpens in new tab · Price may vary
Check Price on eBayFrom $1299 · New & used listings
Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.
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