Side by side

Orient M-Force AC0NvsFormex Reef 42 mm

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

Add a watch

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

What people say

Owners + reviewers, side by side

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

Orient M-Force AC0N

Owners widely praise the Orient M-Force AC0N for its rugged, tank-like appearance and robust, well-built construction, with many citing the reliability of Japanese automatic movements as a key draw. Reviewers and owners consistently flag excellent lume and a superior diver bezel, though one owner notes poor low-light legibility due to weak lume. Accuracy figures vary, with one owner reporting stable +12 seconds/day timekeeping while another found it kept near-perfect time when fully wound; a wobbly crown was also noted by one owner. Overall, owners rate the Orient M-Force AC0N highly for its toughness and value, with its striking design and durable build being the primary reasons for satisfaction.

Formex Reef 42 mm

The Formex Reef 42 mm is widely praised for its comfortable bracelet featuring a micro-adjust clasp, COSC-certified Sellita movement, and excellent build quality. Owners appreciate the gradient dial's visual appeal and the overall wearability. Some owners note the seconds hand does not perfectly align with markers, and one owner found the lugs' taper hinders third-party strap fit. The bracelet's length and sporty design are noted as limiting versatility by some. On balance, owners and reviewers rate the Formex Reef 42 mm highly for its impressive wearability and value at the price point.

At a glance

16 of 29 specs differ
Diameter
M-Force AC0N45mm
Reef 42 mm42mm
Power Reserve
M-Force AC0N40h
Reef 42 mm56h
Water Resistance
M-Force AC0N200m
Reef 42 mm300m
MSRP
M-Force AC0N$555
Reef 42 mm$2,414

Full specifications

Case

5 specs
Diameter
45mm
42mm
Thickness
12.8mm
11.4mm
Lug-to-Lug
52mm
47mm
Lug Width
20mm
22mm
Water Resistance
200m
300m

Crystal & Dial

3 specs
AR Coating
Underside
Dial Color
Green
Black
Lume
None
Super-LumiNova

Movement

7 specs
Caliber
Orient F6 Series
Sellita SW300-1
Beat Rate
21,600 vph
0 vph
Power Reserve
40h
56h
Jewels
22
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
Date
None

Pricing

1 specs
MSRP
$555
$2,414
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

DiscussionNot started
Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.