Side by side

Serica Ref. 5303 Diving ChronometervsGrand Seiko SBGE285

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
SBGE285
Grand SeikoSBGE285
MSRP $8,900

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
SBGE28541mm
Power Reserve
Ref. 5303 Diving Chronometer42h
SBGE28572h
Water Resistance
Ref. 5303 Diving Chronometer300m
SBGE285100m
MSRP
Ref. 5303 Diving Chronometer$1,768
SBGE285$8,900

Full specifications

Case

7 specs
Category
Diver
GMT
Diameter
39mm
41mm
Thickness
12.2mm
13.9mm
Lug-to-Lug
46.5mm
48.3mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m

Crystal & Dial

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

Movement

4 specs
Caliber
M100 COSC
9R66
Type
Automatic
Spring Drive
Power Reserve
42h
72h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$8,900

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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 SBGE285

The Grand Seiko SBGE285 is widely praised for its textured dial, high-intensity titanium case with Zaratsu polishing, and Evolution 9 design, which reviewers consider epitomizes modern Grand Seiko. Owners and reviewers highlight its refined yet sporty appearance and lightweight titanium construction, noting it wears smaller than its 41mm dimensions. The 9R66 Spring Drive movement is lauded for its precision, with accuracy reported at ±1 second per day. One owner notes the watch head shows no wear and there are no scratches on the back of the lugs, indicating excellent overall condition. Overall, owners and reviewers rate the Grand Seiko SBGE285 highly for its blend of sophisticated finishing, comfortable wearability, and precise Spring Drive GMT functionality.

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