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

The Yema Radiance is rated to 30m versus 10m for the Seiko Prospex SPEEDTIMER Mechanical Chronograph.

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

The Seiko Prospex SPEEDTIMER Mechanical Chronograph carries a 45-hour power reserve against 40 hours on the Yema Radiance.

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

The Seiko Prospex SPEEDTIMER Mechanical Chronograph runs a automatic caliber (8R48), while the Yema Radiance runs a quartz.

Side by side

Seiko Prospex SPEEDTIMER Mechanical ChronographvsYema Radiance

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

At MSRP the Yema Radiance is the cheaper of the two at $279, against $2,500 for the Seiko Prospex SPEEDTIMER Mechanical Chronograph — a $2,221 gap before any retailer discounting.

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

The Seiko Prospex SPEEDTIMER Mechanical Chronograph wears larger at 42mm versus 30mm for the Yema Radiance — a 12mm difference across the dial.

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

Seiko Prospex SPEEDTIMER Mechanical Chronograph

srq047j1

MSRP $2,500

Yema Radiance

yema-radiance-ymhf1586-am

MSRP $279

At a glance

15 of 29 specs differ

Diameter

Prospex SPEEDTIMER Mechanical Chronograph42mm

Radiance30mm

Power Reserve

Prospex SPEEDTIMER Mechanical Chronograph45h

Radiance40h

Water Resistance

Prospex SPEEDTIMER Mechanical Chronograph100m

Radiance30m

MSRP

Prospex SPEEDTIMER Mechanical Chronograph$2,500

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

8R48

—

Type

Automatic

Quartz

Power Reserve

45h

40h

Jewels

Pricing

1 specs

MSRP

$2,500

$279

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