Side by side

Marathon GPQ (General Purpose Quartz) Field WatchvsGrand Seiko SBGN027

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

GPQ (General Purpose Quartz) Field Watch
MarathonGPQ (General Purpose Quartz) Field Watch
MSRP $420
SBGN027
Grand SeikoSBGN027
MSRP $3,700

At a glance

11 of 29 specs differ
Diameter
GPQ (General Purpose Quartz) Field Watch34mm
SBGN02739mm
Power Reserve
GPQ (General Purpose Quartz) Field Watch40h
SBGN02740h
Water Resistance
GPQ (General Purpose Quartz) Field Watch30m
SBGN027200m
MSRP
GPQ (General Purpose Quartz) Field Watch$420
SBGN027$3,700

Full specifications

Case

7 specs
Category
Field
GMT
Diameter
34mm
39mm
Thickness
11.5mm
12.3mm
Lug-to-Lug
41mm
45.9mm
Lug Width
16mm
19mm
Material
Fibreshell Composite
Stainless Steel
Water Resistance
30m
200m

Crystal & Dial

2 specs
Crystal
Acrylic
Sapphire
AR Coating
Inner
Yes

Movement

1 specs
Caliber
Swiss High-Torque Quartz (3J, EOL)
9F86

Pricing

1 specs
MSRP
$420
$3,700

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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.

Marathon GPQ (General Purpose Quartz) Field Watch

Owners widely praise the Marathon GPQ (General Purpose Quartz) Field Watch for its rugged quartz movement, accuracy, and tritium lume. Reviewers and owners alike highlight its solid build, legibility, and comfortable, lightweight wear, making it particularly well-suited for smaller wrists. Some owners, however, consider the price point of $350-420 to be somewhat high. On balance, the consensus is that owners rate the Marathon GPQ (General Purpose Quartz) Field Watch highly for its dependable quartz accuracy and excellent tritium lume.

Grand Seiko SBGN027

Owners widely praise the Grand Seiko SBGN027 for its exceptional Zaratsu polishing, compact 39mm size, and versatile monochrome aesthetic, noting its thin profile and suitability as a grab-and-go watch. The 9F quartz movement delivers highly accurate timekeeping, with one owner reporting +/- 10 seconds per year. However, some find the lume limited, the bracelet lacks micro-adjustments, and the GMT hand can be easily mistaken for the minute hand. One owner reported a black index on the bezel disappearing after a couple of months. On balance, owners rate the Grand Seiko SBGN027 highly for its premium finishing and accurate HAQ GMT movement in a wearable size.

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