BOLDR Supply Co. GMT Maasai MaravsGrand 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.

GMT Maasai Mara

SBGJ259
Diameter
40mm
40mm
Lug-to-Lug
46mm
lowest
46.2mm
Thickness
12.6mm
lowest
14mm
Water Resistance
200m
highest
100m
Power Reserve
n/a
55h
MSRP
$469
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.
Owners widely praise the BOLDR Supply Co. GMT Maasai Mara for its accessible GMT complication and the value it offers at its price point, with reviewers highlighting its 40mm stainless-steel case, unique California dial, and 200m water resistance as suitable for everyday wear and travel. Some owners appreciate its less polished case finish and a dial that feels less cluttered than alternatives, while others note its titanium construction contributes to a lightweight feel. One owner expresses curiosity about the long-term performance of the Seiko NH34 movement. On balance, owners and reviewers rate the BOLDR Supply Co. GMT Maasai Mara highly for its practical GMT functionality and appealing design at an accessible price.
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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