Which is cheaper, the CWC RN81 Clearance Diver Automatic Watch or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Seiko Prospex SPEEDTIMER Mechanical is the cheaper of the two at $995, against $1,875 for the CWC RN81 Clearance Diver Automatic Watch — a $880 gap before any retailer discounting.

Which is bigger, the CWC RN81 Clearance Diver Automatic Watch or the Seiko Prospex SPEEDTIMER Mechanical?

The CWC RN81 Clearance Diver Automatic Watch wears larger at 41mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical — a 1.5mm difference across the dial.

Which has better water resistance, the CWC RN81 Clearance Diver Automatic Watch or the Seiko Prospex SPEEDTIMER Mechanical?

The CWC RN81 Clearance Diver Automatic Watch is rated to 300m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the CWC RN81 Clearance Diver Automatic Watch or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 40 hours on the CWC RN81 Clearance Diver Automatic Watch.

What movement does the CWC RN81 Clearance Diver Automatic Watch run compared to the Seiko Prospex SPEEDTIMER Mechanical?

Both watches run automatic movements — the CWC RN81 Clearance Diver Automatic Watch uses the Sellita SW200-1 and the Seiko Prospex SPEEDTIMER Mechanical uses the 6R55.

Side by side

CWC RN81 Clearance Diver Automatic WatchvsSeiko Prospex SPEEDTIMER Mechanical

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

CWC RN81 Clearance Diver Automatic Watch

cwc-rn81-clearance-diver-watch

MSRP $1,875

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

12 of 29 specs differ

Diameter

RN81 Clearance Diver Automatic Watch41mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

RN81 Clearance Diver Automatic Watch40h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

RN81 Clearance Diver Automatic Watch300m

Prospex SPEEDTIMER Mechanical200m

MSRP

RN81 Clearance Diver Automatic Watch$1,875

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

4 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

CWC RN81 Clearance Diver Automatic Watch

Black

Lume

Super-LumiNova

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Sellita SW200-1

6R55

Power Reserve

40h

72h

Jewels

Pricing

1 specs

MSRP

$1,875

$995

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