Side by side

Oak & Oscar The AtwoodvsFormex Reef 39.5 mm

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

The Atwood
Oak & OscarThe Atwood
MSRP $2,650
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

17 of 29 specs differ
Diameter
The Atwood39mm
Reef 39.5 mm39.5mm
Power Reserve
The Atwood58 hoursh
Reef 39.5 mm56h
Water Resistance
The Atwood50m
Reef 39.5 mm300m
MSRP
The Atwood$2,650
Reef 39.5 mm$2,230

Full specifications

Case

8 specs
Category
Chronograph
Diver
Diameter
39mm
39.5mm
Thickness
12.9mm
11mm
Lug-to-Lug
46mm
45.5mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
300m
Caseback
Solid screw-down
Solid

Crystal & Dial

3 specs
Crystal Shape
Double-domed
Flat
AR Coating
Underside
Inner
Dial Color
White
Bahama Blue

Movement

5 specs
Caliber
Sellita AMT5100M
Sellita SW300-1
Type
Manual
Automatic
Beat Rate
4 vph
28,800 vph
Power Reserve
58 hoursh
56h
Jewels
23
25

Pricing

1 specs
MSRP
$2,650
$2,230

Follow this matchup

Get a note when Oak & Oscar The Atwood vs Formex Reef 39.5 mm gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

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

Oak & Oscar The Atwood

Oak & Oscar The Atwood is widely praised for its 39mm size and clean design, with reviewers highlighting the powdery matte sandwich dial and smooth pusher action. The manual-wind Sellita AMT5100M flyback chronograph movement is noted for its blued column wheel. Some reviewers would prefer contrasting case finishes, but the fully brushed finish and drilled lug holes contribute to its tool watch feel. Overall, owners and reviewers rate Oak & Oscar The Atwood highly for its excellent value and compact, tool-watch aesthetic.

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.

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.

Adjacent matchups

People also compared

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