Spinnaker Bradner AutomaticvsSeiko Prospex Sea

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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.

Spinnaker Bradner Automatic at true scale

Bradner Automatic

Seiko Prospex Sea at true scale

Prospex Sea

Diameter

42mm

41.3mm

Lug-to-Lug

50mm

48.2mm

lowest

Thickness

15mm

12.5mm

lowest

Water Resistance

180m

300m

highest

Power Reserve

n/a

72h

MSRP

$420

lowest

$1,100

Movement

Miyota 8215

Seiko 6R55

Case

6 specs
Diameter
42mm
41.3mm
Thickness
15mm
12.5mm
Lug-to-Lug
50mm
48.2mm
Lug Width
22mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
180m
300m

Crystal & Dial

3 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Black
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Miyota 8215
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$420
$1,100
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Reviews

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

Spinnaker Bradner Automatic

Owners widely report the Spinnaker Noir Radiance offers acceptable quality for its price, with some praising its band and color. However, reviewers and owners consistently flag the bezel as difficult to use. One owner found the overall quality okay but not stellar, noting that some Spinnaker models can appear over-designed. The Seiko NH35 movement is seen as common for the price point, with some suggesting a lower price would be more appropriate. On balance, owners rate the Spinnaker Noir Radiance as acceptable for its price, primarily due to its band and color, despite noted usability issues with the bezel.

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its robust build quality and fair price, with many noting its comfortable silicone strap. Some owners find the watch's size, thickness, and weight to be uncomfortable for smaller wrists, while others consider the size perfect. The consensus is that the Seiko Prospex Sea offers excellent value and build quality for its price.