Seiko King TurtlevsTudor Pelagos FXD Chrono
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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.

King Turtle

Pelagos FXD Chrono
Diameter
45mm
43mm
Lug-to-Lug
47.7mm
n/a
Thickness
13.2mm
lowest
13.6mm
Water Resistance
200m
200m
Power Reserve
41h
70h
highest
MSRP
$650
lowest
$5,875
Movement
Seiko 4R36
Tudor MT5813
Case
4 specsCrystal & Dial
2 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Seiko King Turtle is widely praised for its excellent value and robust design, featuring the reliable 4R36 movement. Owners appreciate its superior lume and a bezel action described as smoother and more precise than some siblings. The 45mm cushion case, while substantial, wears smaller than expected due to its shape and short lug-to-lug distance. On balance, owners and reviewers rate the Seiko King Turtle highly for its proven design and overall value proposition.
The King Turtle's ceramic bezel and sapphire crystal are significant upgrades. Reviewers noted a slight price increase for these features.
The Tudor Pelagos FXD Chrono is widely praised for its lightweight carbon composite case, making it comfortable and easy to wear, especially on wrists accustomed to smaller watches. Its exceptional legibility, particularly underwater, and the functional bidirectional countdown bezel are highlighted as key strengths for its intended tool-watch purpose. Owners and reviewers note the MT5813 automatic movement's COSC certification and 70-hour power reserve, with accuracy figures ranging from -2 to +4 seconds per day. Some variants, like the Cycling Edition, feature a tachymeter scale, though its practicality for modern cyclists is debated, and water resistance is noted as 100m for these specific models, differing from the 200m of other FXD versions. On balance, owners and reviewers highly rate the Tudor Pelagos FXD Chrono for its robust, lightweight build and excellent legibility, making it a capable tool watch.
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