Aquastar Benthos 500 IIvsBohen StarDiver
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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.

Benthos 500 II

StarDiver
Diameter
42mm
41mm
Lug-to-Lug
47mm
lowest
48mm
Thickness
15.4mm
14.8mm
lowest
Water Resistance
200m
1000m
highest
Power Reserve
60h
highest
42h
MSRP
$3,590
$2,959
lowest
Movement
Aquastar 1MPS
Automatic
Case
5 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Aquastar Benthos 500 II is widely praised for its wearability, with reviewers and owners noting its comfortable 42mm case and improved ergonomics over the original, making it easy to wear even on smaller wrists. Its unique monopusher chronograph function, operated by a 2 o'clock pusher, is highlighted as exceptionally useful for everyday timing and racing. The watch features a bespoke automatic Aquastar 1MPS movement and is noted for its quality finishing and attractive price for its heritage and unique complications. However, some sources point out that the "500" in the name is misleading given its 200m water resistance, and the stamped clasp on the beads-of-rice bracelet is considered a drawback at its price point. One owner also noted the difficulty in sourcing replacement parts for older models. Overall, owners and reviewers rate the Aquastar Benthos 500 II highly for its blend of vintage charm, modern wearability, and unique monopusher chronograph functionality.
The custom caliber movement is a significant strength. Reviewers did not reach a consensus on any weaknesses.
Owners widely praise the BOHEN StarDiver for its superior finishing and attention to detail, with one owner comparing it favorably to luxury dive watches. Reviewers note its superb fit and finish for the price, highlighting a satisfying 60-click ceramic bezel and a comfortable 13.8mm case height. However, the watch's divisive, angular case and unique design elements, such as a left-side crown, triple-date window, and short hands, may not appeal to all tastes. On balance, owners and reviewers rate the BOHEN StarDiver highly for its exceptional finishing and unique design at its price point.
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