Hamilton Jazzmaster Open Heart vs Longines Master Collection

Both are dress watches in the upper tier. In short: the Hamilton Jazzmaster Open Heart takes more water (50m) — better with splashes, but neither is rated for regular swimming (100m). The Hamilton Jazzmaster Open Heart is automatic, 50m water resistance, 40mm, sapphire crystal; the Longines Master Collection is automatic, 30m water resistance, 40mm, sapphire crystal.

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

Spec	Hamilton Jazzmaster Open Heart	Longines Master Collection
Movement	Automatic	Automatic
Water resistance	50m	30m
Case size	40mm	40mm
Crystal	sapphire	sapphire
Style	Dress	Dress
Price tier	Upper	Upper

Which should you buy?

The Hamilton Jazzmaster Open Heart takes more water (50m) — better with splashes, but neither is rated for regular swimming (100m).

Where to buy

Hamilton Jazzmaster Open HeartSee price on AmazonCheck price

Longines Master CollectionSee price on AmazonCheck price

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FAQ

What's the difference between the Hamilton Jazzmaster Open Heart and the Longines Master Collection?
Both are dress watches in the upper tier. The Hamilton Jazzmaster Open Heart is automatic, 50m water resistance, 40mm, sapphire crystal; the Longines Master Collection is automatic, 30m water resistance, 40mm, sapphire crystal.

Which has better water resistance, the Hamilton Jazzmaster Open Heart or the Longines Master Collection?
The Hamilton Jazzmaster Open Heart, rated 50m, versus 30m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Hamilton Jazzmaster Open Heart or the Longines Master Collection?
Both sit in the upper 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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