Grand Seiko SBGM245vsUndone Basecamp Collector
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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.

SBGM245

Basecamp Collector
Diameter
40.5mm
40mm
Lug-to-Lug
48.6mm
n/a
Thickness
14.4mm
n/a
Water Resistance
200m
highest
100m
Power Reserve
72h
n/a
MSRP
$6,100
$695
lowest
Movement
Grand Seiko 9S66
Seiko NH34
Case
6 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 Grand Seiko SBGM245 as a compelling mechanical GMT, blending sport and luxury with notable workmanship. Some owners find its 40.5mm case size and 14.4mm thickness wearable, while others consider it too large and prefer slimmer alternatives. The polished surfaces are noted to scratch easily, suggesting it is best suited for dressier occasions. Accuracy figures vary, with one owner reporting an average gain of two seconds per day, while others express a desire for a thinner case and a clasp with quick extension. Overall, owners rate the Grand Seiko SBGM245 highly for its mechanical GMT functionality and craftsmanship, despite some reservations about its size and scratch resistance.
Owners widely praise the Undone Basecamp Collector for its attractive, vintage-inspired design and excellent value, with reviewers highlighting its well-finished 40mm steel case that feels comfortable and versatile, offering excellent polishing for its price. Some owners report strong accuracy around 20 seconds off per week, and the Seiko NH34 automatic movement provides confidence. The watch features a bi-directional bezel with good friction, and some variants offer dual luminant colors and unique dials. However, the mineral crystal can cause glare, and the ultra-domed polycarbonate crystal, while contributing to an "instant vintage feeling," may present durability concerns for some. The 40mm case has short lugs that make it wear noticeably smaller, which may be outside the ideal range for some despite larger wrists. Overall, owners and reviewers rate the Undone Basecamp Collector highly for its vintage aesthetic and strong value proposition at its price point.
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