Side by side

Serica Ref. 5303 Diving ChronometervsHamilton Khaki Navy Frogman Auto

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
Khaki Navy Frogman Auto
HamiltonKhaki Navy Frogman Auto
MSRP $1,395

At a glance

10 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Khaki Navy Frogman Auto41mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Khaki Navy Frogman Auto80h
Water Resistance
Ref. 5303 Diving Chronometer300m
Khaki Navy Frogman Auto300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Khaki Navy Frogman Auto$1,395

Full specifications

Case

3 specs
Diameter
39mm
41mm
Thickness
12.2mm
13.09mm
Lug-to-Lug
46.5mm
46mm

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
H-10
Power Reserve
42h
80h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$1,395

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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 Navy Frogman Auto

The Hamilton Khaki Navy Frogman Auto is praised for its wearable 41mm size and graceful silhouette, with reviewers highlighting its clean, date-free dial and well-defined bezel clicks. The H-10 automatic movement provides an 80-hour power reserve. Some reviewers note drawbacks such as a stiff rubber strap and buckle, and bezel grip in wet conditions. The case features brushed surfaces with polished bevels. On balance, reviewers rate the Hamilton Khaki Navy Frogman Auto highly for its blend of standout design and wearable dimensions.

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