Islander Calabro GMT World Time Automatic with Anthracite DialvsGrand Seiko SBGJ259
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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.

Calabro GMT World Time Automatic with Anthracite Dial

SBGJ259
Diameter
40mm
40mm
Lug-to-Lug
48mm
46.2mm
lowest
Thickness
14mm
14mm
Water Resistance
200m
highest
100m
Power Reserve
n/a
55h
MSRP
$379
lowest
$7,700
Movement
Seiko NH34
Grand Seiko 9S86
Case
4 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Islander Calabro GMT World Time Automatic Watch with Anthracite Dial #ISL-316 owners widely report excellent value at its $329 MSRP, citing the Seiko NH34 automatic movement, sapphire crystal, and well-proportioned 40mm case. The watch features a handsome anthracite dial with applied indices and a quality 120-click unidirectional bezel. On balance, owners rate the Islander Calabro GMT World Time Automatic Watch with Anthracite Dial #ISL-316 highly for its value and robust feature set at the price point.
The Grand Seiko SBGJ259 "Urban Bamboo" is noted for its striated green dial, though one owner observes the color appears more yellow in person than in official images, and another considers the dial "low-tier" for Grand Seiko. This model is considered a dressier piece within the Grand Seiko lineup. The movement is the automatic Grand Seiko 9S86, rated for accuracy between +5 and -3 seconds per day with a 55-hour power reserve. On balance, owners have mixed views on the dial's appearance, with some admiring its unique green hue and others finding it less appealing than expected.
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