Side by side

Serica Ref. 5303 Diving ChronometervsGrand Seiko SBGW257

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
SBGW257
Grand SeikoSBGW257
MSRP $38,000

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
SBGW25738mm
Power Reserve
Ref. 5303 Diving Chronometer42h
SBGW25772h
Water Resistance
Ref. 5303 Diving Chronometer300m
SBGW25730m
MSRP
Ref. 5303 Diving Chronometer$1,768
SBGW257$38,000

Full specifications

Case

7 specs
Category
Diver
Dress
Diameter
39mm
38mm
Thickness
12.2mm
10.9mm
Lug-to-Lug
46.5mm
45.8mm
Lug Width
20mm
19mm
Material
Stainless Steel
Platinum
Water Resistance
300m
30m

Crystal & Dial

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

Movement

4 specs
Caliber
M100 COSC
9S64
Type
Automatic
Manual
Power Reserve
42h
72h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$38,000

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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 SBGW257

The Grand Seiko SBGW257 is a platinum dress watch praised for its refined, subtle luxury and classic design. Reviewers highlight its 38mm diameter and 10.9mm thickness as near-perfect sizing for a dress watch. The watch features an 18k white gold dial with a sunray-brushed silver finish and gold hour markers, complemented by a refined application of the Grand Seiko wordmark. It is powered by the manual-wind Caliber 9S64 movement, offering a 72-hour power reserve and an accuracy rating of +5 to -3 seconds per day. The Grand Seiko SBGW257 is priced at €39,000. On balance, reviewers appreciate the Grand Seiko SBGW257 for its exquisite finishing and classic proportions, embodying a quiet luxury.

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