Seiko Prospex Land Mechanical GMTvsUndone 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.

Seiko Prospex Land Mechanical GMT at true scale

Prospex Land Mechanical GMT

Undone Basecamp Collector at true scale

Basecamp Collector

Diameter

39.5mm

40mm

Lug-to-Lug

46.4mm

n/a

Thickness

13.6mm

n/a

Water Resistance

200m

highest

100m

Power Reserve

72h

n/a

MSRP

$1,150

$695

lowest

Movement

Seiko 6R54

Seiko NH34

Case

6 specs
Diameter
39.5mm
40mm
Thickness
13.6mm
n/a
Lug-to-Lug
46.4mm
n/a
Lug Width
20mm
n/a
Material
Stainless Steel
Titanium
Water Resistance
200m
100m

Crystal & Dial

4 specs
Crystal Shape
Curved
n/a
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
n/a
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
Seiko 6R54
Seiko NH34
Power Reserve
72h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$1,150
$695
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Prospex Land Mechanical GMT

Owners widely praise the Seiko Prospex Land Mechanical GMT for its faithful reconstruction of the 6117 design, its attractive gray dial, and comfortable bracelet. Reviewers highlight its handsome everyday sports watch appeal and classic Seiko diver aesthetics. However, community members are split on the value proposition, with many deeming it overpriced at $970, suggesting a better price point around $700 or on sale. Some owners criticize the 6R54 movement's accuracy, reporting deviations of up to +/- 20 seconds per day, and prefer a local jumping GMT function over the caller style. On balance, owners and reviewers appreciate the Seiko Prospex Land Mechanical GMT's design and wearability, but opinions are divided on its price and movement performance relative to alternatives.

Undone Basecamp Collector

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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