Jack Mason Strat-o-timer 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.

Jack Mason Strat-o-timer GMT at true scale

Strat-o-timer GMT

Undone Basecamp Collector at true scale

Basecamp Collector

Diameter

40mm

40mm

Lug-to-Lug

47mm

n/a

Thickness

13.2mm

n/a

Water Resistance

200m

highest

100m

Power Reserve

42h

n/a

MSRP

$1,099

$695

lowest

Movement

Miyota 9075

Seiko NH34

Case

5 specs
Thickness
13.2mm
n/a
Lug-to-Lug
47mm
n/a
Lug Width
20mm
n/a
Material
Stainless Steel
Titanium
Water Resistance
200m
100m

Movement

2 specs
Caliber
Miyota 9075
Seiko NH34
Power Reserve
42h
0h

Pricing

1 specs
MSRP
$1,099
$695
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Reviews

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

Jack Mason Strat-o-timer GMT

Owners and reviewers widely praise the Jack Mason Strat-o-timer GMT for its excellent value and impressive fit and finish, particularly noting the quality of the 7-link bracelet and the scratch-resistant sapphire bezel insert. The watch is recognized for offering a true traveler's GMT complication with the Miyota 9075 movement at a competitive price point, with many appreciating its comfortable 40mm tonneau case and vintage styling. Some owners find the hour markers to be a bit chunky, and one user noted slightly scratchy crown operation. Overall, owners rate the Jack Mason Strat-o-timer GMT highly for its exceptional value and build quality at its price point.

From video reviewers

The Miyota 9075 true GMT movement is a consistent strength. Reviewers noted the exceptional lightness and comfort due to Grade 2 titanium construction. Opinions on whether further refinements are needed were not shared.

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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