Side by side

Serica Ref. 8315 Travel ChronometervsMarathon GPQ (General Purpose Quartz) Field Watch

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

Ref. 8315 Travel Chronometer
SericaRef. 8315 Travel Chronometer
MSRP $2,479
GPQ (General Purpose Quartz) Field Watch
MarathonGPQ (General Purpose Quartz) Field Watch
MSRP $420

At a glance

16 of 29 specs differ
Diameter
Ref. 8315 Travel Chronometer39mm
GPQ (General Purpose Quartz) Field Watch34mm
Power Reserve
Ref. 8315 Travel Chronometer42h
GPQ (General Purpose Quartz) Field Watch40h
Water Resistance
Ref. 8315 Travel Chronometer200m
GPQ (General Purpose Quartz) Field Watch30m
MSRP
Ref. 8315 Travel Chronometer$2,479
GPQ (General Purpose Quartz) Field Watch$420

Full specifications

Case

7 specs
Category
GMT
Field
Diameter
39mm
34mm
Thickness
12.3mm
11.5mm
Lug-to-Lug
46.5mm
41mm
Lug Width
20mm
16mm
Material
Stainless Steel
Fibreshell Composite
Water Resistance
200m
30m

Crystal & Dial

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

Movement

4 specs
Caliber
SOPROD C125 COSC
Swiss High-Torque Quartz (3J, EOL)
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
GMT, COSC
None

Pricing

1 specs
MSRP
$2,479
$420

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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.

Serica Ref. 8315 Travel Chronometer

Serica Ref. 8315 Travel Chronometer owners and reviewers praise its neo-vintage aesthetic, comfortable 39mm size, and unique day/night bezel design. Some find the lack of a date function a drawback, and the mirrored 12-hour bezel with AM/PM text is considered less practical than a traditional 24-hour bezel for time zone reading, with the lollipop-style 24-hour hand and asymmetrical bezel design also noted as potentially confusing. The watch is powered by a COSC-certified Soprod C125 movement with a 40-hour power reserve. One owner noted import duties and that the strap's aggressive taper required using the last hole for a proper fit. On balance, Serica Ref. 8315 Travel Chronometer is appreciated for its distinctive design and wearability, though its GMT functionality and bezel design are points of contention for some.

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.

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