Side by side

Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited EditionvsYema Radiance

Q: Which is cheaper, the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition or the Yema Radiance?

At MSRP the Yema Radiance is the cheaper of the two at $279, against $1,150 for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition — a $871 gap before any retailer discounting.

Q: Which is bigger, the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition or the Yema Radiance?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition wears larger at 39.5mm versus 30mm for the Yema Radiance — a 9.5mm difference across the dial.

Q: Which has better water resistance, the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition or the Yema Radiance?

The Yema Radiance is rated to 30m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition.

Q: Which has a longer power reserve, the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition or the Yema Radiance?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition carries a 72-hour power reserve against 40 hours on the Yema Radiance.

Q: What movement does the Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition run compared to the Yema Radiance?

The Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition runs a automatic caliber (6R55), while the Yema Radiance runs a quartz.

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

Seiko Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition

spb517j1

MSRP $1,150

Yema Radiance

yema-radiance-ymhf1586-am

MSRP $279

At a glance

15 of 29 specs differ

Diameter

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition39.5mm

Radiance30mm

Power Reserve

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition72h

Radiance40h

Water Resistance

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition200m

Radiance30m

MSRP

Prospex SPEEDTIMER Mechanical Datsun 240Z Limited Edition$1,150

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

$1,150

$279

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