Side by side

Serica Ref. 5303 Diving ChronometervsBremont ALT1-WT

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
ALT1-WT
BremontALT1-WT
MSRP $5,900

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
ALT1-WT43mm
Power Reserve
Ref. 5303 Diving Chronometer42h
ALT1-WT40h
Water Resistance
Ref. 5303 Diving Chronometer300m
ALT1-WT100m
MSRP
Ref. 5303 Diving Chronometer$1,768
ALT1-WT$5,900

Full specifications

Case

7 specs
Category
Diver
World Timer
Diameter
39mm
43mm
Thickness
12.2mm
16mm
Lug-to-Lug
46.5mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium (DLC coated)
Water Resistance
300m
100m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
BE-54AE
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$5,900

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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.

Bremont ALT1-WT

The Bremont ALT1-WT is widely praised for its wearable 43mm size, legible dial with a globe background, and robust hardened steel case. Reviewers and owners highlight its well-executed world timer and chronograph functions, the satisfying click of its world timer bezel, and its value for money. Some find the hands can disappear in certain light conditions, and one owner notes a slight gap between the strap and case. The Bremont ALT1-WT uses a COSC-certified ETA/Valjoux 7750-based movement with a world timer module. On balance, owners and reviewers rate the Bremont ALT1-WT highly for its practical combination of chronograph and world-time functions in a well-built, wearable package.

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