Side by side

Serica Ref. 5303 Diving ChronometervsGrand Seiko SLGB001

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
SLGB001
Grand SeikoSLGB001
MSRP $39,000

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
SLGB00137mm
Power Reserve
Ref. 5303 Diving Chronometer42h
SLGB00172h
Water Resistance
Ref. 5303 Diving Chronometer300m
SLGB001100m
MSRP
Ref. 5303 Diving Chronometer$1,768
SLGB001$39,000

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
39mm
37mm
Thickness
12.2mm
11.4mm
Lug-to-Lug
46.5mm
44.3mm
Material
Stainless Steel
Platinum
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None

Movement

4 specs
Caliber
M100 COSC
9RB2
Type
Automatic
Spring Drive
Power Reserve
42h
72h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$39,000

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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.

Grand Seiko SLGB001

The Grand Seiko SLGB001 is a limited edition platinum watch in the Evolution 9 collection, featuring a 37mm case and the new Calibre 9RB2 Spring Drive U.F.A. movement, rated to ±20 seconds per year. It has an "Ice Forest" dial with a deep blue hue and a silver seconds hand, but notably lacks lume. A criticism is the absence of a micro-adjustment clasp on its leather strap. Overall, reviewers highlight the watch's advanced movement and distinctive dial as key features.

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