Side by side

Fortis Stratoliner S-41vsFormex Reef 39.5 mm

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

Stratoliner S-41
FortisStratoliner S-41
MSRP $5,450
Reef 39.5 mm
FormexReef 39.5 mm
MSRP $2,230

At a glance

12 of 29 specs differ
Diameter
Stratoliner S-4141mm
Reef 39.5 mm39.5mm
Power Reserve
Stratoliner S-4160h
Reef 39.5 mm56h
Water Resistance
Stratoliner S-41200m
Reef 39.5 mm300m
MSRP
Stratoliner S-41$5,450
Reef 39.5 mm$2,230

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
41mm
39.5mm
Thickness
14mm
11mm
Lug-to-Lug
45.5mm
Lug Width
21mm
22mm
Water Resistance
200m
300m

Crystal & Dial

2 specs
Dial Color
White
Bahama Blue
Lume
None
Super-LumiNova

Movement

3 specs
Caliber
Manufacture Caliber WERK 17
Sellita SW300-1
Power Reserve
60h
56h
Jewels
36
25

Pricing

1 specs
MSRP
$5,450
$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.

Fortis Stratoliner S-41

Owners widely praise the Fortis Stratoliner S-41 for its purpose-built design and outstanding details, particularly its space blue lume and bright orange date on the dial. Reviewers note the WERK 17 movement offers a 60-hour power reserve. However, the Fortis Stratoliner S-41's 41mm case thickness and lug-to-lug distance lead some to perceive it as wearing large, and the dial's small text and flat design are flagged as potential drawbacks. Overall, owners and reviewers highlight the Fortis Stratoliner S-41's unique design and innovative movement as its primary strengths.

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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