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Seiko 5 Sport SRPD vs Bulova Marine Star

Both are everyday watches in the mid tier. In short: the Seiko 5 Sport SRPD is mechanical (automatic) for the enthusiast feel and no battery; the Bulova Marine Star is quartz for accuracy and low maintenance. The Seiko 5 Sport SRPD is automatic, 100m water resistance, 42.5mm, hardlex crystal; the Bulova Marine Star is quartz, 100m water resistance, 44mm, mineral crystal.

Last verified 2026-06-27 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

SpecSeiko 5 Sport SRPDBulova Marine Star
MovementAutomaticQuartz
Water resistance100m100m
Case size42.5mm44mm
Crystalhardlexmineral
StyleEveryday / casualEveryday / casual
Price tierMidMid

Which should you buy?

The Seiko 5 Sport SRPD is mechanical (automatic) for the enthusiast feel and no battery; the Bulova Marine Star is quartz for accuracy and low maintenance.

Where to buy

Seiko 5 Sport SRPDSee price on AmazonCheck price

Bulova Marine StarSee price on AmazonCheck price

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FAQ

What's the difference between the Seiko 5 Sport SRPD and the Bulova Marine Star?
Both are everyday watches in the mid tier. The Seiko 5 Sport SRPD is automatic, 100m water resistance, 42.5mm, hardlex crystal; the Bulova Marine Star is quartz, 100m water resistance, 44mm, mineral crystal.

Which is better value, the Seiko 5 Sport SRPD or the Bulova Marine Star?
Both sit in the mid tier, so it comes down to movement, water resistance and case size — see the spec table above.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-27. Copy a ready-made reference:

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