Seiko Prospex SeavsSpinnaker Spence 300

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Seiko Prospex Sea at true scale

Prospex Sea

Spinnaker Spence 300 at true scale

Spence 300

Diameter

41mm

40mm

Lug-to-Lug

46.9mm

lowest

48mm

Thickness

12.3mm

11.5mm

lowest

Water Resistance

200m

300m

highest

Power Reserve

70h

n/a

MSRP

$900

$650

lowest

Movement

Seiko 6R35

Seiko NH35

Case

5 specs
Diameter
41mm
40mm
Thickness
12.3mm
11.5mm
Lug-to-Lug
46.9mm
48mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal Shape
Curved
n/a
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
Aquamarine
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 6R35
Seiko NH35
Power Reserve
70h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$900
$650
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its value and robust build, with many highlighting its excellent lume and attractive design. Some owners find the 41mm case size perfect, while others with smaller wrists consider it too large, thick, and heavy. The stock rubber strap is noted as uncomfortable for land wear by one owner. Overall, owners rate the Seiko Prospex Sea highly for its design and value at the price point.

Spinnaker Spence 300

Owners widely praise the Spinnaker Spence 300 for its slim 10.9mm case and 40mm diameter, offering a comfortable and versatile wear. Reviewers and owners alike highlight its value, with some seeing it as a budget alternative to more expensive dive watches. The watch features a Seiko NH35 automatic movement and 300m water resistance. However, some community members find the dial printing and bracelet finishing to be less refined, and a few suggest other brands offer better value at similar price points. On balance, owners and reviewers rate the Spinnaker Spence 300 highly for its impressive case dimensions and overall value proposition.

From video reviewers

The watch's thin 10.9mm profile for a 300m diver is a key strength. No shared weakness was identified.

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