Beaufort BicompaxvsSeiko Prospex SPEEDTIMER Mechanical

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Beaufort Bicompax at true scale

Bicompax

Seiko Prospex SPEEDTIMER Mechanical at true scale

Prospex SPEEDTIMER Mechanical

Diameter

40.5mm

39.5mm

Lug-to-Lug

47mm

44.5mm

lowest

Thickness

13.8mm

12mm

lowest

Water Resistance

50m

200m

highest

Power Reserve

63h

72h

highest

MSRP

$810

lowest

$995

Movement

Sellita SW510

Seiko 6R55

Case

4 specs
Diameter
40.5mm
39.5mm
Thickness
13.8mm
12mm
Lug-to-Lug
47mm
44.5mm
Water Resistance
50m
200m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
Salmon
n/a
Lume
Super-LumiNova applied to the index and hands for low-light readability.
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Sellita SW510
Seiko 6R55
Type
Manual
Automatic
Power Reserve
63h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$810
$995
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Beaufort Bicompax

Owners widely praise the Beaufort Bicompax for its attractive bicompax chronograph design, clean aesthetic, and excellent legibility with effective lume. The Sellita SW510 BH b movement is noted for performing well, with winding and setting actions comparable to ETA movements and accuracy within COSC parameters at +5 seconds/day. Fit and finish are considered spot on, with a well-executed gradient dial and subdials, and the h-link bracelet is described as comfortable and easy to size. Some owners find the price a bit high for the specifications on paper, and one commenter felt the blue dial could have more depth. On balance, owners and reviewers rate the Beaufort Bicompax highly for its vintage aesthetic and reliable manual-wind chronograph movement at 40.5mm.

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is widely praised for its comfortable 39.5mm case size and appealing matte silver-white dial with LumiBrite indices. Owners find the watch visually attractive and comfortable for daily wear, with the 72-hour power reserve of the 6R55 automatic movement noted as a strength. Some users appreciate the chronograph function for everyday tasks, while others acknowledge it is rarely used by most purchasers. The watch features a countdown bezel and 20 bar water resistance. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its wearability and practical power reserve.

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