Aquastar Benthos 500 IIvsOrient Kamasu

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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.

Aquastar Benthos 500 II at true scale

Benthos 500 II

Orient Kamasu at true scale

Kamasu

Diameter

42mm

41.8mm

Lug-to-Lug

47mm

47mm

Thickness

15.4mm

12.8mm

lowest

Water Resistance

200m

200m

Power Reserve

60h

highest

40h

MSRP

$3,590

$375

lowest

Movement

Aquastar 1MPS

Orient F6922

Case

2 specs
Diameter
42mm
41.8mm
Thickness
15.4mm
12.8mm

Crystal & Dial

1 specs
Lume
Super-LumiNova
None

Movement

7 specs
Caliber
Aquastar 1MPS
Orient F6922
Beat Rate
0 vph
21,600 vph
Power Reserve
60h
40h
Jewels
0
22
Hacking
No
Yes
Hand-winding
No
Yes
Complications
None
Day-date

Pricing

1 specs
MSRP
$3,590
$375
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Reviews

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

Aquastar Benthos 500 II

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.

From video reviewers

The custom caliber movement is a significant strength. Reviewers did not reach a consensus on any weaknesses.

Orient Kamasu

Owners widely praise the Orient Kamasu for its exceptional value, robust build quality suitable for daily wear, and appealing design features like applied indices and a sunburst dial. Reviewers and owners alike highlight its strong lume, sapphire crystal, hacking and hand-winding F6922 movement, and comfortable, well-proportioned case. However, multiple sources note that the bezel exhibits noticeable play and can sometimes become sticky, while some owners find the bracelet's hollow end links and pressed clasp to be a weak point, with one owner reporting a rattle and another finding the crown difficult to grip. On balance, owners and reviewers rate the Orient Kamasu highly for its impressive finishing and features for the price point, making it a standout value diver.

From video reviewers

The Orient Kamasu's compact package makes it suitable for smaller wrists without compromising wrist presence. A notable weakness is that the bracelet is decent but may have some issues, although the reviewer does not elaborate. Reviewers disagree on the value for money, with one highlighting the affordable price and in-house movement, while the other implies a trade-off in value.

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