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Home/Browse/Seiko/Prospex Sea 1965 Heritage Diver's Watch
Seiko Prospex Sea 1965 Heritage Diver's Watch
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Seiko Prospex Sea 1965 Heritage Diver's Watch

Diver

The Seiko Prospex Sea 1965 Heritage Diver's Watch is praised for its refined engineering and updated features, including a 300m water resistance and a 72-hour power reserve from the Caliber 6R55 movement in a 40mm case. Owners note its better build quality and interesting finishing with a mix of polished and brushed surfaces. The "Tranquil Teal" variant features a jewel-toned dial with a rippling-water pattern. However, some owners consider the price too high, and concerns exist regarding the accuracy of the 6R movements, with some reporting theirs run slow. One review notes a reflective dial that impacts legibility. On balance, owners and reviewers appreciate the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined design and improved specifications over previous generations, despite some reservations about movement accuracy and price.

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Prospex Sea The Black Series
2 Variants
Lume:LumiBrite on hands, index(es) and bezel
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Retail MSRP
$1,300
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Alternatives
Case
40mm
Power Reserve
72h
Movement
Automatic
Water Resistance
300m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter40mm
Thickness13mm
Lug-to-Lug46.4mm
Lug Width20mm
02

Case Build

MaterialStainless Steel
Water Resistance300m
03

Crystal & Dial

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

Movement

Caliber
6R55
TypeAutomatic
Beat Rate—
Power Reserve72 hours
Jewels24
HackingNo
Hand-WindingNo
ComplicationsTime only
05

Design Language

Dial styleMatte
BezelRotating (dive)
Bracelet / strapLug-attached bracelet
HandsBaton
AI-detected from product image · 5/22/2026

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Seiko Prospex Sea 1965 Heritage Diver's WatchvsChristopher Ward C65 Aquitaine Bronze COSC→
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