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 $1,100

At a glance

13 of 29 specs differ
Diameter
Stratoliner S-4141mm
Prospex Sea41.3mm
Power Reserve
Stratoliner S-4160h
Prospex Sea72h
Water Resistance
Stratoliner S-41200m
Prospex Sea300m
MSRP
Stratoliner S-41$5,450
Prospex Sea$1,100

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
41mm
41.3mm
Thickness
14mm
12.5mm
Lug-to-Lug
48.2mm
Lug Width
21mm
20mm
Water Resistance
200m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
Manufacture Caliber WERK 17
6R55
Power Reserve
60h
72h
Jewels
36
24

Pricing

1 specs
MSRP
$5,450
$1,100

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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 models are widely praised for their excellent build quality, value for money, and comfortable wearability, with many appreciating the vintage-inspired designs and robust construction. Owners note the silicone straps are surprisingly comfortable and well-finished, and the Lumibrite lume is excellent. However, some find the 44.3mm size and thickness too large for smaller wrists, though others report the sizing as perfect. The 6R15 movement in some variants offers accuracy around +4 seconds per day with a 50-hour power reserve, while newer movements offer more. Some models are criticized for a bracelet width not matching the case size or a rudimentary clasp for their price point. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its impressive case work and finishing at its price point.

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