Pinion NeutronvsSeiko Seiko 5 Sports SRPJ89

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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.

Pinion Neutron at true scale

Neutron

Seiko Seiko 5 Sports SRPJ89 at true scale

Seiko 5 Sports SRPJ89

Diameter

38mm

36.4mm

Lug-to-Lug

45mm

n/a

Thickness

11mm

lowest

12.5mm

Water Resistance

100m

100m

Power Reserve

40h

n/a

MSRP

$1,600

$300

lowest

Movement

Sellita SW200-1

Seiko 4R36

Case

5 specs
Diameter
38mm
36.4mm
Thickness
11mm
12.5mm
Lug-to-Lug
45mm
n/a
Lug Width
20mm
n/a
Finish
n/a
Stainless steel

Crystal & Dial

4 specs
Crystal
Sapphire
Hardlex
AR Coating
Yes
n/a
Dial Color
n/a
Green
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW200-1
Seiko 4R36
Power Reserve
40h
0h

Pricing

1 specs
MSRP
$1,600
$300
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Reviews

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

Pinion Neutron

The Pinion Neutron is widely praised for its refined 38mm case design, exceptional dial finishing, and overall build quality. Owners and reviewers alike highlight the detailed guilloché dial as a standout feature. The watch is powered by a Sellita SW200-1 automatic movement, with reported accuracy ranging from ±5 seconds per day. While the case finishing is highly regarded, one owner found the OEM straps to be poor quality and replaced them with an aftermarket option. The Pinion Neutron retails around £1,050-£1,200. Overall, owners and reviewers rate the Pinion Neutron highly for its impressive dial detail and case finishing at its price point.

Seiko 5 Sports SRPJ89

Owners widely praise the Seiko 5 Sports SRPJ89 for its tough and reliable build, making it a great value that appears more expensive than its price suggests. The bracelet's solid links and end links are appreciated, though the pressed clasp with limited micro-adjustment is a noted downside, leading some to prefer aftermarket straps or the included NATO for casual wear. The crown at 3 o'clock is a welcome feature for a Seiko 5. On balance, owners rate the Seiko 5 Sports SRPJ89 highly for its everyday toughness and perceived value.