Side by side

Serica Ref. 5303 Diving ChronometervsSternglas Naos Großdatum

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
Naos Großdatum
SternglasNaos Großdatum
MSRP $323

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Naos Großdatum38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Naos Großdatum
Water Resistance
Ref. 5303 Diving Chronometer300m
Naos Großdatum50m
MSRP
Ref. 5303 Diving Chronometer$1,768
Naos Großdatum$323

Full specifications

Case

5 specs
Category
Diver
Dress
Diameter
39mm
38mm
Thickness
12.2mm
10mm
Lug-to-Lug
46.5mm
42mm
Water Resistance
300m
50m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Lume
Super-LumiNova
Luminova Punkten

Movement

5 specs
Caliber
M100 COSC
Seiko VJ76
Type
Automatic
Quartz
Power Reserve
42h
Jewels
25
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$323

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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.

Sternglas Naos Großdatum

The Sternglas Naos Großdatum is praised for its Bauhaus aesthetic and value, with one owner finding it an affordable alternative to other designs. However, some owners report it feels underwhelming and cheap, with a printed-on face, small font, and toy-like hands, and find the strap to be of poor quality. The watch features a 38mm stainless steel case, an Alabaster dial with beige LumiNova, and a Seiko TMI VJ76 quartz movement rated for -20/+20 seconds per month. On balance, owners and reviewers are divided, with the primary point of contention being the perceived quality and aesthetic execution of the Sternglas Naos Großdatum.

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