Side by side

Seiko Prospex SeavsLongines HYDROCONQUEST

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Prospex Sea
SeikoProspex Sea
MSRP $900
HYDROCONQUEST
LonginesHYDROCONQUEST
MSRP $2,000

At a glance

19 of 29 specs differ
Diameter
Prospex Sea41mm
HYDROCONQUEST41mm
Power Reserve
Prospex Sea70h
HYDROCONQUEST72h
Water Resistance
Prospex Sea200m
HYDROCONQUEST300m
MSRP
Prospex Sea$900
HYDROCONQUEST$2,000

Full specifications

Case

7 specs
Thickness
12.3mm
11.9mm
Lug-to-Lug
46.9mm
53.5mm
Lug Width
20mm
21mm
Material
Stainless Steel
Ceramic
Finish
Brushed and polished
Water Resistance
200m
300m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Curved
AR Coating
Anti-reflective coating on inner surface
Dial Color
Black
Green
Indices
Applied
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

6 specs
Caliber
6R35
L888.5
Beat Rate
28,800 vph
0 vph
Power Reserve
70h
72h
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$900
$2,000

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent lume, robust build, and value, with many highlighting the comfortable 4 o'clock crown and reliable movements. Reviewers note impressive case finishing and attractive dials, with specific models lauded for their gradient blue designs and smooth bezel actions. Accuracy figures vary, with one owner reporting +9 seconds/day after demagnetization, while others find the watches to be good first "proper" watches. Some owners find the stock rubber straps uncomfortable or the overall size substantial on smaller wrists. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its combination of strong dive watch functionality and appealing design at its price point.

Longines HYDROCONQUEST

Owners widely praise the Longines Hydroconquest for its attractive sunburst blue dial and accurate timekeeping, with one owner reporting a loss of only 2 seconds per day. However, the bracelet is frequently criticized for lacking micro-adjustments and having pinch-prone links, and the screw-down crown is noted as inconvenient and difficult to operate by multiple owners. Some owners also flag the bezel action as ratchety with back play, and one owner found the lugs sharp and the overall design uncomfortable, leading them to sell the watch. On balance, owners appreciate the Longines Hydroconquest's aesthetic appeal and value, despite significant reservations about its bracelet and crown usability.

From video reviewers

The bezel action is praised for its smooth and precise rotation. Lume brightness is a shared weakness, found to be somewhat lacking. Reviewers disagreed on the watch's value proposition compared to alternatives.

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