Side by side

Serica Ref. 5303 Diving ChronometervsHamilton Khaki Aviation Khaki Pilot GMT 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 Aviation Khaki Pilot GMT Auto
HamiltonKhaki Aviation Khaki Pilot GMT Auto
MSRP $1,575

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Khaki Aviation Khaki Pilot GMT Auto44mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Khaki Aviation Khaki Pilot GMT Auto50h
Water Resistance
Ref. 5303 Diving Chronometer300m
Khaki Aviation Khaki Pilot GMT Auto100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Khaki Aviation Khaki Pilot GMT Auto$1,575

Full specifications

Case

6 specs
Category
Diver
Pilot
Diameter
39mm
44mm
Thickness
12.2mm
12.1mm
Lug-to-Lug
46.5mm
46mm
Lug Width
20mm
22mm
Water Resistance
300m
100m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
2893-2
Power Reserve
42h
50h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$1,575

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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 Aviation Khaki Pilot GMT Auto

Owners widely praise the Hamilton Khaki Aviation Khaki Pilot GMT Auto as an underrated, value-packed GMT with good finishing and a sapphire crystal, powered by an ETA 2893-2 movement. Some find the GMT hand obscures legibility, while others consider it legible and appreciate the slim design, though its 44mm size is noted as large by some. One owner describes it as functioning more as an "office GMT" than a traveler's GMT. On balance, owners and reviewers rate the Hamilton Khaki Aviation Khaki Pilot GMT Auto highly for its excellent value and GMT functionality.

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