Side by side

Serica Ref. 5303 Diving ChronometervsHamilton Khaki Field Mechanical

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

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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.

Hamilton Khaki Field Mechanical

Owners widely praise the Hamilton Khaki Field Mechanical as an archetype of a field watch, highlighting its thin case, excellent finishing, and smooth winding action, with some calling it the best pure field watch available. The daily winding ritual is considered a charming aspect of ownership, and the branding is noted as tasteful and subtle. One owner specifically appreciates the lugs. A drawback cited is the highly reflective, non-AR-coated crystal, and accuracy ranges from -6 seconds per day to unspecified better performance. Overall, owners rate the Hamilton Khaki Field Mechanical highly for its rugged, all-business aesthetic and value as a quintessential field watch.

From video reviewers

The watch's pure field style design is a significant strength. The lume brightness is a shared weakness. Reviewers disagreed on the power reserve, with one stating 80 hours and another 46 hours.

At a glance

15 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Khaki Field Mechanical36mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Khaki Field Mechanical80h
Water Resistance
Ref. 5303 Diving Chronometer300m
Khaki Field Mechanical100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Khaki Field Mechanical$725

Full specifications

Case

6 specs
Category
Diver
Field
Diameter
39mm
36mm
Thickness
12.2mm
10.2mm
Lug-to-Lug
46.5mm
46mm
Lug Width
0mm
18mm
Water Resistance
300m
100m

Crystal & Dial

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

Movement

4 specs
Caliber
Soprod M100
Hamilton H-50
Type
Automatic
Manual
Power Reserve
42h
80h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$725
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