Which is cheaper, the Beaufort Bicompax or the Seiko Prospex SPEEDTIMER Mechanical?

At MSRP the Seiko Prospex SPEEDTIMER Mechanical is the cheaper of the two at $995, against $1,399 for the Beaufort Bicompax — a $404 gap before any retailer discounting.

Which is bigger, the Beaufort Bicompax or the Seiko Prospex SPEEDTIMER Mechanical?

The Beaufort Bicompax wears larger at 40.5mm versus 39.5mm for the Seiko Prospex SPEEDTIMER Mechanical — a 1mm difference across the dial.

Which has better water resistance, the Beaufort Bicompax or the Seiko Prospex SPEEDTIMER Mechanical?

The Beaufort Bicompax is rated to 50m versus 20m for the Seiko Prospex SPEEDTIMER Mechanical.

Which has a longer power reserve, the Beaufort Bicompax or the Seiko Prospex SPEEDTIMER Mechanical?

The Seiko Prospex SPEEDTIMER Mechanical carries a 72-hour power reserve against 63 hours on the Beaufort Bicompax.

What movement does the Beaufort Bicompax run compared to the Seiko Prospex SPEEDTIMER Mechanical?

The Beaufort Bicompax runs a manual caliber (Sellita SW510M BH b), while the Seiko Prospex SPEEDTIMER Mechanical runs a automatic (6R55).

Side by side

Beaufort BicompaxvsSeiko Prospex SPEEDTIMER Mechanical

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

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Beaufort Bicompax

bicompax-circuit-panda-1

MSRP $1,399

Seiko Prospex SPEEDTIMER Mechanical

spb513j1

MSRP $995

At a glance

14 of 29 specs differ

Diameter

Bicompax40.5mm

Prospex SPEEDTIMER Mechanical39.5mm

Power Reserve

Bicompax63h

Prospex SPEEDTIMER Mechanical72h

Water Resistance

Bicompax50m

Prospex SPEEDTIMER Mechanical200m

MSRP

Bicompax$1,399

Prospex SPEEDTIMER Mechanical$995

Full specifications

Case

5 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Anti-reflective coating on inner surface

Dial Color

Salmon

Black

Lume

Super-LumiNova applied to the index and hands for low-light readability.

LumiBrite on hands and index(es)

Movement

4 specs

Caliber

Sellita SW510M BH b

6R55

Type

Manual

Automatic

Power Reserve

63h

72h

Jewels

Pricing

1 specs

MSRP

$1,399

$995

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Beaufort BicompaxvsSeiko Prospex SPEEDTIMER Mechanical

At a glance

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