Side by side

Marathon GPQ (General Purpose Quartz) Field WatchvsPhoibos Reef Master

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
Reef Master
PhoibosReef Master
MSRP $335

At a glance

14 of 29 specs differ
Diameter
GPQ (General Purpose Quartz) Field Watch34mm
Reef Master42mm
Power Reserve
GPQ (General Purpose Quartz) Field Watch40h
Reef Master40h
Water Resistance
GPQ (General Purpose Quartz) Field Watch30m
Reef Master200m
MSRP
GPQ (General Purpose Quartz) Field Watch$420
Reef Master$335

Full specifications

Case

7 specs
Category
Field
Diver
Diameter
34mm
42mm
Thickness
11.5mm
13mm
Lug-to-Lug
41mm
48mm
Lug Width
16mm
22mm
Material
Fibreshell Composite
Stainless Steel
Water Resistance
30m
200m

Crystal & Dial

4 specs
Crystal
Acrylic
Sapphire
AR Coating
Inner
Yes
Dial Color
Black
Green
Lume
None
Super-LumiNova

Movement

2 specs
Caliber
Swiss High-Torque Quartz (3J, EOL)
SII NH38
Type
Quartz
Automatic

Pricing

1 specs
MSRP
$420
$335

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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.

Phoibos Reef Master

Owners widely praise the Phoibos Reef Master for its exceptional value, highlighting its sapphire crystal, DLC coating, and extensive BGW9 lume. The watch is noted for its cool lume, with one owner finding it not bulky despite its robust build. The Shamrock Green dial and texture are highly praised, as is the comfortable bracelet with solid end links. However, the bezel action is described as rough, and the basic folding clasp is a disappointment. Accuracy is reported as excellent, with one owner seeing +-2 sec/day. Some find the 42mm size almost too big for their wrists, and the date window is considered too small. Overall, owners rate the Phoibos Reef Master highly for its impressive feature set and value at its price point.

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