Side by side

Serica Ref. 5303 Diving ChronometervsSugess Seestern S430 Titanium Diver

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
Seestern S430 Titanium Diver
SugessSeestern S430 Titanium Diver
MSRP $299

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Seestern S430 Titanium Diver40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Seestern S430 Titanium Diver40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Seestern S430 Titanium Diver200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Seestern S430 Titanium Diver$299

Full specifications

Case

5 specs
Diameter
39mm
40mm
Thickness
12.2mm
12.5mm
Lug-to-Lug
46.5mm
46mm
Material
Stainless Steel
Titanium
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Blue
Lume
Super-LumiNova
Tritium

Movement

4 specs
Caliber
M100 COSC
Seiko NH35
Beat Rate
28,800 vph
3 vph
Power Reserve
42h
40h
Complications
COSC
GMT, Chronograph, Moonphase, Date

Pricing

1 specs
MSRP
$1,768
$299

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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.

Sugess Seestern S430 Titanium Diver

Owners widely praise the Sugess Seestern S430 Titanium Diver for its genuine titanium construction, making it extremely light and comfortable at 92 grams on a 6.7-inch wrist. The ceramic bezel is described as fantastic and mesmerizing to use, and the brushed finishing is noted as nice. The watch features an NH38 movement, which is appreciated for its lack of ghost date functionality. However, some owners find the price comparable to competitors and have noted issues with the clasp's fit, with some finding the existing holes insufficient and the rotating arm needing to bend. The crown unscrewing is not smooth, and the bezel action is described as gritty with uneven resistance. One owner reported a crown tube failure on a V1 model. Overall, owners rate the Sugess Seestern S430 Titanium Diver highly for its lightweight titanium build and excellent ceramic bezel, despite some concerns regarding the clasp design.

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