Side by side

Serica Ref. 5303 Diving ChronometervsMarathon GPQ-D (Officer's Quartz with Date) Field Watch

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

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
GPQ-D (Officer's Quartz with Date) Field Watch
MarathonGPQ-D (Officer's Quartz with Date) Field Watch
MSRP $650

At a glance

15 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
GPQ-D (Officer's Quartz with Date) Field Watch36mm
Power Reserve
Ref. 5303 Diving Chronometer42h
GPQ-D (Officer's Quartz with Date) Field Watch40h
Water Resistance
Ref. 5303 Diving Chronometer300m
GPQ-D (Officer's Quartz with Date) Field Watch30m
MSRP
Ref. 5303 Diving Chronometer$1,768
GPQ-D (Officer's Quartz with Date) Field Watch$650

Full specifications

Case

7 specs
Category
Diver
Field
Diameter
39mm
36mm
Thickness
12.2mm
11mm
Lug-to-Lug
46.5mm
44mm
Lug Width
20mm
16mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
30m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None

Movement

4 specs
Caliber
M100 COSC
Swiss High-Torque Quartz (3J, EOL)
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$650

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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. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

Marathon GPQ-D (Officer's Quartz with Date) Field Watch

Marathon GPQ-D (Officer's Quartz with Date) Field Watch owners praise its tritium tubes, Mil-spec designation, and scratch-resistant case finish, with some finding the 36mm size practical for field use. However, some owners criticize its perceived overpriced nature, thick case, and squared-off lugs, while others point to the composite case material, 30m water resistance, and unbranded movement as drawbacks. On balance, owners are divided on the Marathon GPQ-D (Officer's Quartz with Date) Field Watch, with opinions split on its value and design features.

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