BOLDR Supply Co. GMT Maasai MaravsSeiko 5 Sports Field series
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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

5 Sports Field series
Diameter
40mm
39.4mm
Lug-to-Lug
46mm
lowest
47.9mm
Thickness
12.6mm
lowest
13.6mm
Water Resistance
200m
highest
100m
Power Reserve
n/a
41h
MSRP
$469
$450
lowest
Movement
Seiko NH34
Seiko 4R34
Case
4 specsCrystal & Dial
4 specsMovement
3 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 Seiko 5 Sports Field series is praised for its accessible explorer watch design and decent fit and finish for its price point. Reviewers note the inclusion of a caller GMT complication powered by the 4R34 automatic movement. On balance, owners and reviewers find the Seiko 5 Sports Field series a compelling option for its explorer aesthetic and GMT functionality at an accessible price.
The prominent five-sided GMT hand enhances legibility and adds a sophisticated aesthetic to the watch. The Seiko 5 Sports Field series offers similar functionality to the Explorer 2 at a lower price, making it a valuable option. Reviewers disagree on whether it's a missed opportunity for Seiko to release this model first, with one reviewer implying it would have been a more logical addition to their lineup.
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