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Home/Browse/Seiko/Prospex Sea
Seiko Prospex Sea
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Seiko Prospex Sea

Diver

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.

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Prospex Sea The Black Series
1 Variant
Lume:LumiBrite on hands, index(es) and bezel
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Retail MSRP
$900
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Alternatives
Case
41mm
Power Reserve
70h
Movement
Automatic
Water Resistance
200m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter41mm
Thickness12.3mm
Lug-to-Lug46.9mm
Lug Width20mm
02

Case Build

MaterialStainless Steel
Water Resistance200m
03

Crystal & Dial

CrystalSapphire
ShapeCurved
AR CoatingAnti-reflective coating on inner surface
LumeLumiBrite on hands, index(es) and bezel
04

Movement

Caliber
Seiko 6R35
TypeAutomatic
Beat Rate—
Power Reserve70 hours
Jewels24
HackingNo
Hand-WindingNo
ComplicationsTime only
05

Design Language

Dial styleMatte
BezelRotating (dive)
Bracelet / strapRubber strap
HandsBaton
AI-detected from product image · 5/22/2026
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