Which is cheaper, the Seiko Prospex SPEEDTIMER Mechanical or the Yema Radiance?

At MSRP the Yema Radiance is the cheaper of the two at $279, against $995 for the Seiko Prospex SPEEDTIMER Mechanical — a $716 gap before any retailer discounting.

Which is bigger, the Seiko Prospex SPEEDTIMER Mechanical or the Yema Radiance?

The Seiko Prospex SPEEDTIMER Mechanical wears larger at 39.5mm versus 30mm for the Yema Radiance — a 9.5mm difference across the dial.

Which has better water resistance, the Seiko Prospex SPEEDTIMER Mechanical or the Yema Radiance?

The Yema Radiance is rated to 30m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Seiko Prospex SPEEDTIMER Mechanical or the Yema Radiance?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 40 hours on the Yema Radiance.

What movement does the Seiko Prospex SPEEDTIMER Mechanical run compared to the Yema Radiance?

The Seiko Prospex SPEEDTIMER Mechanical runs a automatic caliber (6R55), while the Yema Radiance runs a quartz.

Side by side

Seiko Prospex SPEEDTIMER MechanicalvsYema Radiance

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

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

Yema Radiance

yema-radiance-ymhf1586-am

MSRP $279

At a glance

15 of 29 specs differ

Diameter

Prospex SPEEDTIMER Mechanical39.5mm

Radiance30mm

Power Reserve

Prospex SPEEDTIMER Mechanical72h

Radiance40h

Water Resistance

Prospex SPEEDTIMER Mechanical200m

Radiance30m

MSRP

Prospex SPEEDTIMER Mechanical$995

Radiance$279

Full specifications

Case

7 specs

Crystal & Dial

3 specs

Crystal Shape

Curved

Flat

AR Coating

Anti-reflective coating on inner surface

Inner

Lume

LumiBrite on hands and index(es)

None

Movement

4 specs

Caliber

6R55

—

Type

Automatic

Quartz

Power Reserve

72h

40h

Jewels

Pricing

1 specs

MSRP

$995

$279

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Seiko Prospex SPEEDTIMER MechanicalvsYema Radiance

At a glance

Full specifications

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