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Hamilton Jazzmaster Open Heart vs Seiko King Seiko SPB281

Both are dress watches — here's how the specs differ and which to pick.

Last verified 2026-06-11 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

SpecHamilton Jazzmaster Open HeartSeiko King Seiko SPB281
MovementAutomaticAutomatic
Water resistance50m50m
Case size40mm37mm
Crystalsapphiresapphire
StyleDressDress
Price tierUpperPremium

Which should you buy?

Where to buy

Check the Hamilton Jazzmaster Open Heart price on Amazon →

Check the Seiko King Seiko SPB281 price on Amazon →

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FAQ

What's the difference between the Hamilton Jazzmaster Open Heart and the Seiko King Seiko SPB281?
Both are dress watches. The Hamilton Jazzmaster Open Heart is automatic, 50m water resistance, 40mm, sapphire crystal; the Seiko King Seiko SPB281 is automatic, 50m water resistance, 37mm, sapphire crystal.

Which is better value, the Hamilton Jazzmaster Open Heart or the Seiko King Seiko SPB281?
The Hamilton Jazzmaster Open Heart is the lower-priced tier; the other steps up in build for more money — confirm both live prices at the retailer.

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