Seiko HBC007J1vsYema Diver

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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 HBC007J1 at true scale

HBC007J1

Yema Diver at true scale

Diver

Diameter

39.5mm

39.5mm

Lug-to-Lug

46.4mm

n/a

Thickness

13.6mm

10.9mm

lowest

Water Resistance

200m

200m

Power Reserve

72h

n/a

MSRP

$1,150

$990

lowest

Movement

Seiko 6R54

Sellita SW200-1

Case

3 specs
Thickness
13.6mm
10.95mm
Lug-to-Lug
46.4mm
n/a
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

1 specs
Dial Color
n/a
Black

Movement

2 specs
Caliber
Seiko 6R54
Sellita SW200-1
Power Reserve
72h
0h

Pricing

1 specs
MSRP
$1,150
$990
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Reviews

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

Seiko HBC007J1

Owners widely praise the Seiko HBC007J1's "alive" feel and reflective green dial, with one owner preferring it over a more expensive alternative. The 39.5mm case is noted as a contemporary take on a classic design. Some owners find the 1-12 ring a "purpose nerf," and the included strap is considered underwhelming. Accuracy is rated at -15/+25 seconds per day, and some may prefer a flyer GMT at its $1,150 price point. On balance, owners and reviewers rate the Seiko HBC007J1 well for its vibrant dial and engaging character at the price.

Yema Diver

One owner reported a water ingress issue on their Yema Diver the first time it got wet in a lake, despite rinsing and inspecting the watch and bezel. Another owner noted that this manual wind Yema Diver, while featuring a cool patina, is unlikely to be waterproof or gain value, positioning it as a fun second watch rather than an investment. Overall, owners view the Yema Diver as a fun second watch rather than an investment, with one owner experiencing a water ingress issue.

From video reviewers

The Swiss Sellita movement is a notable feature. Reviewers did not reach a consensus on any weaknesses.