Aera Instruments C-1vsBeaufort Bicompax
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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.

C-1

Bicompax
Diameter
42mm
40.5mm
Lug-to-Lug
49.5mm
47mm
lowest
Thickness
15.8mm
13.8mm
lowest
Water Resistance
100m
highest
50m
Power Reserve
56h
63h
highest
MSRP
$2,950
$810
lowest
Movement
Sellita SW510
Sellita SW510
Case
5 specsCrystal & Dial
2 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Aera Instruments C-1 is praised for its excellent, distinctive design that balances tool-watch masculinity with soft, gentle aesthetics. The 42mm case size is considered large, and a smaller option would be welcome. On balance, reviewers highlight the distinctive design as the primary reason for their positive assessment.
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.
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