Duckworth Prestex Belmont 300 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.

Duckworth Prestex Belmont 300 Automatic at true scale

Belmont 300 Automatic

Seiko Prospex Sea at true scale

Prospex Sea

Diameter

42mm

43.8mm

Lug-to-Lug

50mm

48.7mm

lowest

Thickness

13mm

12.8mm

lowest

Water Resistance

300m

highest

200m

Power Reserve

38h

41h

highest

MSRP

$750

$625

lowest

Movement

Miyota 9039

Seiko 4R35

Case

5 specs
Diameter
42mm
43.8mm
Thickness
13mm
12.8mm
Lug-to-Lug
50mm
48.7mm
Lug Width
n/a
22mm
Water Resistance
300m
200m

Crystal & Dial

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

Movement

3 specs
Caliber
Miyota 9039
Seiko 4R35
Power Reserve
38h
41h
Jewels
0
23

Pricing

1 specs
MSRP
$750
$625
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Reviews

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

Duckworth Prestex Belmont 300 Automatic

Owners find Duckworth Prestex watches interesting and good value, with the Belmont model specifically noted for its wavy dial pattern. Some owners consider the brand's price point ambitious compared to other microbrands. Overall, owners find Duckworth Prestex watches interesting and good value, particularly liking the Belmont model for its wavy dial pattern.

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value as a sport watch, with owners highlighting its comfortable wearability and generous lume. Reviewers note its solid build quality and attractive design, with some specifically mentioning the matte black dial as a strong point. One owner reports accuracy around +1 to +2 seconds per day. The 43.8mm case size is considered substantial by some, and one owner found the watch heavy and thick, regretting not choosing a different variant. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its blend of classic design and modern utility at an accessible price point.