Seiko Prospex SeavsSynchron Poseidon Ice Diver
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.
Prospex Sea
Poseidon Ice Diver
Diameter
41.7mm
42mm
Lug-to-Lug
49.5mm
45mm
lowest
Thickness
12.3mm
lowest
12.5mm
Water Resistance
200m
300m
highest
Power Reserve
41h
68h
highest
MSRP
$595
n/a
Movement
Seiko 4R35
La Joux-Perret G100
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely report the Seiko Prospex Sea is a well-built watch at a fair price, with some finding its 41.7mm case size perfect while others with smaller wrists consider it big, thick, and heavy. Reviewers consistently praise the excellent lume and robust design. One owner notes the bezel action is smoother and more precise than some other Seiko divers. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its value and proven design.
Owners widely praise the Synchron Poseidon Ice Diver for its value and wearability, with many noting its balanced feel and comfortable Isofrane strap, even on smaller wrists. The La Joux-Perret G100 automatic movement is consistently highlighted for its smooth winding and accuracy, with one owner reporting -4 seconds per day. The 120-click bezel action is well-regarded, and the watch is considered a good value at its price point. Overall, owners rate the Synchron Poseidon Ice Diver highly for its comfortable wearability and reliable Swiss movement at an accessible price.
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