Side by side

Fortis Stratoliner S-41vsSeiko Prospex Sea

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
Prospex Sea
SeikoProspex Sea
MSRP $1,500

At a glance

13 of 29 specs differ
Diameter
Stratoliner S-4141mm
Prospex Sea43.5mm
Power Reserve
Stratoliner S-4160h
Prospex Sea70h
Water Resistance
Stratoliner S-41200m
Prospex Sea200m
MSRP
Stratoliner S-41$5,450
Prospex Sea$1,500

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
41mm
43.5mm
Thickness
14mm
13.3mm
Lug-to-Lug
51mm
Lug Width
21mm
22mm
Material
Stainless Steel
Titanium

Crystal & Dial

3 specs
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
White
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Manufacture Caliber WERK 17
6R35
Power Reserve
60h
70h
Jewels
36
24

Pricing

1 specs
MSRP
$5,450
$1,500

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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.

Seiko Prospex Sea

Seiko Prospex Sea owners and reviewers praise its Marinemaster-style aesthetic, excellent case finishing, and impressive LumiBrite lume. The watch is powered by the 6R15 movement with a 50-hour power reserve and comes with both a steel bracelet and a silicone strap. Some owners find the Seiko Prospex Sea to be a great value and a suitable first "proper" watch, while others report it is uncomfortably big, thick, and heavy on smaller wrists. Reviewers note the GMT function is secondary with a less prominent scale, and the bezel's quieter clicks may not appeal to all. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its classic design and finishing at its price point.

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