Side by side

Seiko Prospex Land MechanicalvsSpinnaker Dumas GMT

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

Prospex Land Mechanical
SeikoProspex Land Mechanical
MSRP $995
Dumas GMT
SpinnakerDumas GMT
MSRP $399

At a glance

14 of 29 specs differ
Diameter
Prospex Land Mechanical39.5mm
Dumas GMT44mm
Power Reserve
Prospex Land Mechanical72h
Dumas GMT40h
Water Resistance
Prospex Land Mechanical200m
Dumas GMT300m
MSRP
Prospex Land Mechanical$995
Dumas GMT$399

Full specifications

Case

7 specs
Category
Field
GMT
Diameter
39.5mm
44mm
Thickness
12.7mm
15mm
Lug-to-Lug
46.4mm
48mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Blue
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
6R55
Seiko NH34A
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$995
$399

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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

Owners widely praise the Seiko Prospex Land Mechanical for its unique style, useful day-date complication, and value, with some finding it suitable as a one-watch-for-all-occasions. Accuracy and durability are noted as strengths, with one owner reporting good performance even in water submersion. However, multiple owners criticize its size, with figures around 41mm to 43mm and 14.4mm thickness being flagged as too large and thick for smaller wrists. The Hardlex crystal and a potentially loose inner compass bezel are also points of criticism. On balance, owners rate the Seiko Prospex Land Mechanical highly for its unique style and value, despite concerns over its substantial dimensions.

Spinnaker Dumas GMT

Owners praise the Spinnaker Dumas GMT's satisfying lume, including on the crown, and good finishing, with one owner finding it wears well on a 17cm wrist. The watch features a Seiko NH34A GMT movement and a blue gradient dial. Reviewers note its 44mm diameter and 209g weight on the bracelet make it unsuitable for smaller wrists.

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