Side by side

Seiko Prospex Land Mechanical GMTvsUndone Basecamp Stealth Steel

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

What people say

Owners + reviewers, side by side

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 a classic design, comfortable bracelet, and attractive gray dial with a bubbly crystal. Reviewers highlight its handsome everyday sports watch appeal, solid specifications, and classic Seiko diver aesthetics, offering great value. However, community members are divided on the 6R movement's accuracy, with some reporting significant deviations even after regulation, while others find it competitive for the price. A point of contention is the GMT function, with some wishing for a "flyer" style local jump GMT instead of the "caller" type, and the internal compass bezel is described as finicky and difficult to read. Owners generally consider the Seiko Prospex Land Mechanical GMT overpriced at its retail price, suggesting better value is found on sale or closer to $700.

Undone Basecamp Stealth Steel

Owners widely praise the Undone Basecamp Stealth Steel for its unique Cali/waffle dial and blacked-out case, with the 40mm size wearing smaller due to short lugs. One owner reports the watch keeping great time, approximately 20 seconds off after a week. The crown's pull-out and push-in action lacks a sharp click, feeling more like pushing into rubber. On balance, owners rate the Undone Basecamp Stealth Steel highly for its distinctive design and wearability at the 40mm size.

At a glance

15 of 29 specs differ
Diameter
Prospex Land Mechanical GMT39.5mm
Basecamp Stealth Steel40mm
Power Reserve
Prospex Land Mechanical GMT72h
Basecamp Stealth Steel
Water Resistance
Prospex Land Mechanical GMT200m
Basecamp Stealth Steel100m
MSRP
Prospex Land Mechanical GMT$1,150
Basecamp Stealth Steel$400

Full specifications

Case

6 specs
Category
GMT
Diameter
39.5mm
40mm
Thickness
13.6mm
0mm
Lug-to-Lug
46.4mm
0mm
Lug Width
20mm
0mm
Water Resistance
200m
100m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$1,150
$400
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