Side by side

Orient RA-AC0K Diver WatchvsFormex Reef 39.5 mm

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

RA-AC0K Diver Watch
OrientRA-AC0K Diver Watch
MSRP $455
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

15 of 29 specs differ
Diameter
RA-AC0K Diver Watch43.4mm
Reef 39.5 mm39.5mm
Power Reserve
RA-AC0K Diver Watch40h
Reef 39.5 mm56h
Water Resistance
RA-AC0K Diver Watch200m
Reef 39.5 mm300m
MSRP
RA-AC0K Diver Watch$455
Reef 39.5 mm$2,230

Full specifications

Case

4 specs
Diameter
43.4mm
39.5mm
Thickness
12.8mm
11mm
Lug-to-Lug
51mm
45.5mm
Water Resistance
200m
300m

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Black
Bahama Blue
Indices
Applied
Lume
None
Super-LumiNova

Movement

5 specs
Caliber
F6722
Sellita SW300-1
Beat Rate
21,600 vph
28,800 vph
Power Reserve
40h
56h
Jewels
22
25
Complications
Date
None

Pricing

1 specs
MSRP
$455
$2,230

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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.

Formex Reef 39.5 mm

The Formex Reef 39.5 mm is widely praised for its refined finishing, comfortable and well-proportioned case design, and impressive specifications for its price point, including COSC-certified Sellita SW300-1 movement and 300m water resistance. Owners and reviewers highlight the tool-less micro-adjust clasp and quick-release spring bars as practical features. Some reviewers note that the 22mm lug width feels slightly disproportionate to the smaller case, and the bracelet could benefit from more taper, though this is a point of contention for some owners who value the overall package. A prototype crown protrusion issue is noted as being addressed for production. On balance, owners and reviewers rate the Formex Reef 39.5 mm highly for its excellent value and well-executed design.

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