Aquastar Benthos 500 IIvsCWC RN81 Clearance Diver Automatic
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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

RN81 Clearance Diver Automatic
Diameter
42mm
41mm
Lug-to-Lug
47mm
47mm
Thickness
15.4mm
12.7mm
lowest
Water Resistance
200m
300m
highest
Power Reserve
60h
n/a
MSRP
$3,590
$1,875
lowest
Movement
Aquastar 1MPS
Sellita SW200-1
Case
4 specsCrystal & Dial
1 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 CWC RN81 Clearance Diver Automatic Watch for its build quality and comfortable wear, with some appreciating the fixed springbars and historical significance as a tool watch. However, reviewers and owners note the "faux patina" lume color is considered too gold and glossy, and some find the polished case and dial text/logo less appealing. The CWC RN81 Clearance Diver Automatic Watch is also seen as overpriced by some, with concerns raised about the acrylic bezel's durability and import taxes for US buyers. On balance, owners and reviewers value the CWC RN81 Clearance Diver Automatic Watch for its faithful reissue design and historical connection, though price and specific aesthetic choices are points of contention.
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