Seiko
Prospex Samurai Automatic Diver SRPB51
Last verified by the Lifetime Picks Editorial Team
Why we picked it
200m ISO diver
Warranty: 2 yearsMade in: JapanSatisfaction: 92%
200m ISO rated. Seiko 4R35 automatic, Hardlex crystal, distinctive 'Samurai' case shape. r/Watches popular pick under $500.
2 years Made in Japan
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Community & Review Summary
4.6/ 5
980 Amazon reviews
92%
r/BuyItForLife satisfaction
200+
Total mentions (295 positive)
N/A
Amazon category rank
Price History
Jun 25Jun 26
We began tracking this price on Jun 19, 2026. The chart fills in as more prices are recorded; see CamelCamelCamel below for older history.
Pros & Cons from Reviews
Pros
- +200m ISO diver
- +Distinctive Samurai case
- +Seiko 4R35 automatic
- +Sub-$500 dive watch
Cons
- -Hardlex crystal (not sapphire)
- -Lume could be brighter
Independent Video Reviews
Hands-on reviews from independent channels (not the manufacturer), covering what they like and what they do not.