Side by side

Orient RA-AC0K Diver WatchvsSinn U18

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

What people say

Owners + reviewers, side by side

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

Orient RA-AC0K Diver Watch

Owners widely praise the Orient RA-AC0K Diver Watch for exceeding expectations and being a "real" watch. The mechanical movement is noted for keeping great time, running within a handful of seconds fast per day, with some owners considering Orient's budget movements among the best for accuracy. Overall, owners rate the Orient RA-AC0K Diver Watch highly for its surprising quality and reliable timekeeping at its price point.

Sinn U18

The Sinn U18 is praised for its unique deep blue/green dial with three-dimensional oxygen bubbles that change with light, and its comfortable, easily adjustable bracelet. Owners find the watch stunning and a piece of history, appreciating the refined hands. The Sinn U18 features a 44mm, 15.5mm thick case made from German submarine steel, offering a 2000-meter dive specification and Sinn's Ar-Dehumidifying technology, powered by a Sellita SW300-1 movement. The case thickness is apparent, and the watch comes as a complete set with box and papers for $3,000-$3,680. On balance, owners and reviewers rate the Sinn U18 highly for its striking dial and robust build.

At a glance

18 of 29 specs differ
Diameter
RA-AC0K Diver Watch43.4mm
U1844mm
Power Reserve
RA-AC0K Diver Watch40h
U1842h
Water Resistance
RA-AC0K Diver Watch200m
U182,000m
MSRP
RA-AC0K Diver Watch$455
U18$3,488

Full specifications

Case

7 specs
Diameter
43.4mm
44mm
Thickness
12.8mm
15.5mm
Lug-to-Lug
51mm
Material
Stainless Steel
high-strength
Finish
Water Resistance
200m
2000m
Caseback

Crystal & Dial

3 specs
Crystal Shape
AR Coating
Indices

Movement

7 specs
Caliber
Orient F6722
Sellita SW300-1
Beat Rate
21,600 vph
28,800 vph
Power Reserve
40h
42h
Jewels
22
25
Hacking
Yes
No
Hand-winding
Yes
No
Complications
Date
None

Pricing

1 specs
MSRP
$455
$3,488
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