Side by side

Serica Ref. 5303 Diving ChronometervsSugess Seestern S434 Pro 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 S434 Pro Diver
SugessSeestern S434 Pro Diver
MSRP $249

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Seestern S434 Pro Diver40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Seestern S434 Pro Diver40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Seestern S434 Pro Diver200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Seestern S434 Pro Diver$249

Full specifications

Case

6 specs
Diameter
39mm
40mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
46mm
Material
Stainless Steel
Stainless Steel/Rose Gold
Water Resistance
300m
200m
Caseback
Solid
Engraved

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
2 Salmon
Lume
Super-LumiNova
Super-LumiNova BGW9

Movement

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

Pricing

1 specs
MSRP
$1,768
$249

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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 S434 Pro Diver

Owners widely praise the Sugess Seestern S434 Pro Diver for its impressive finishing and craftsmanship at its price point, highlighting the applied indices that play with light, excellent BGW9 lume, and attractive color options. Specific positive notes include the domed sapphire crystal, short lug-to-lug, and on-the-fly clasp adjustment. However, some owners report quality control issues such as misaligned bezels or indices, while others with V2 models experience no such problems. Caveats include slight bezel back play, light AR coating on the crystal, and a clasp that could be smoother, with one owner desiring a color-matched date wheel. On balance, owners rate the Sugess Seestern S434 Pro Diver highly for its exceptional value and build quality, particularly the dial finishing and lume.

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