Which is cheaper, the Seiko Prospex SPEEDTIMER Mechanical or the Nodus Unity?

At MSRP the Nodus Unity is the cheaper of the two at $725, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $270 gap before any retailer discounting.

Which is bigger, the Seiko Prospex SPEEDTIMER Mechanical or the Nodus Unity?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 36.5mm for the Nodus Unity — a 3mm difference across the dial.

Which has better water resistance, the Seiko Prospex SPEEDTIMER Mechanical or the Nodus Unity?

The Nodus Unity is rated to 150m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Seiko Prospex SPEEDTIMER Mechanical or the Nodus Unity?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 41 hours on the Nodus Unity.

What movement does the Seiko Prospex SPEEDTIMER Mechanical run compared to the Nodus Unity?

Both watches run automatic movements — the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55 and the Nodus Unity uses the Miyota Cal.9015 Premium Automatic.

Side by side

Seiko Prospex SPEEDTIMER MechanicalvsNodus Unity

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

Nodus Unity

unity-pearl-white

MSRP $725

At a glance

12 of 29 specs differ

Diameter

Prospex SPEEDTIMER Mechanical39.5mm

Unity36.5mm

Power Reserve

Prospex SPEEDTIMER Mechanical72h

Unity41h

Water Resistance

Prospex SPEEDTIMER Mechanical200m

Unity150m

MSRP

Prospex SPEEDTIMER Mechanical$995

Unity$725

Full specifications

Case

5 specs

Crystal & Dial

4 specs

Crystal Shape

Curved

Box

AR Coating

Anti-reflective coating on inner surface

Yes

Dial Color

Black

—

Lume

LumiBrite on hands and index(es)

Swiss Super-LumiNova® BGW9 Grade A

Movement

2 specs

Caliber

6R55

Miyota Cal.9015 Premium Automatic

Power Reserve

72h

41h

Pricing

1 specs

MSRP

$995

$725

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What people say

Owners + reviewers, side by side

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

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

Time + Tide

Monochrome

Nodus Unity

The Nodus Unity is praised for its novel design, featuring a fixed ceramic bezel and a textured sunray dial, and its slim 36.5mm case. It is powered by a Miyota 9015 movement, regulated to ±8 seconds per day, with a 41-hour power reserve and 150m water resistance. Reviewers note the well-executed bracelet with a five-position extension clasp, though its aesthetic is compromised when fully extended. Some find the dial colors may not appeal to everyone. Overall, reviewers highlight the Nodus Unity's refined yet playful sports watch aesthetic and slim wearability at its price point.

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