San Martin Vintage MM300 Automatic SN0087vsSeiko King Turtle
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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.
Vintage MM300 Automatic SN0087
King Turtle
Diameter
44mm
45mm
Lug-to-Lug
n/a
47.7mm
Thickness
n/a
13.2mm
Water Resistance
300m
highest
200m
Power Reserve
n/a
41h
MSRP
$198
lowest
$650
Movement
Seiko NH35
Seiko 4R36
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.
The San Martin Vintage MM300 Automatic SN0087 is praised for its top-notch case and handset finishing, consistent with the brand's reputation. Despite its 44mm case and 14mm thickness, owners report it wears noticeably smaller and fits comfortably on a 7" wrist. Some owners find the design a "messy mixup" and note the lume is an "ugly yellow," preferring BGW9 over C3. One owner found the pin and collar bracelet difficult to resize, with the half-link prone to damage. Overall, owners rate the San Martin Vintage MM300 Automatic SN0087 highly for its impressive finishing and comfortable wearability despite its dimensions.
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.
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