Side by side

Fortis Stratoliner S-41vsLongines PrimaLuna Moonphase

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
PrimaLuna Moonphase
LonginesPrimaLuna Moonphase
MSRP $2,950

At a glance

21 of 29 specs differ
Diameter
Stratoliner S-4141mm
PrimaLuna Moonphase34mm
Power Reserve
Stratoliner S-4160h
PrimaLuna Moonphase72h
Water Resistance
Stratoliner S-41200m
PrimaLuna Moonphase30m
MSRP
Stratoliner S-41$5,450
PrimaLuna Moonphase$2,950

Full specifications

Case

8 specs
Category
Chronograph
Moonphase
Diameter
41mm
34mm
Thickness
14mm
11.6mm
Lug-to-Lug
41mm
Lug Width
21mm
8mm
Finish
Brushed and polished
Water Resistance
200m
30m
Caseback
Solid
Transparent case back with sapphire crystal

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Both sides
Dial Color
White
Blue
Indices
Applied
Diamond indexes
Lume
None
Super-LumiNova

Movement

7 specs
Caliber
Manufacture Caliber WERK 17
L899.5
Beat Rate
28,800 vph
25,200 vph
Power Reserve
60h
72h
Jewels
36
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date, Moon phase display at 6 o'clock

Pricing

1 specs
MSRP
$5,450
$2,950

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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.

Longines PrimaLuna Moonphase

The Longines PrimaLuna Moonphase features a fluid case design and a 72-hour power reserve from its automatic movement. Owners note its accuracy averages 1.3 seconds lost per day across six positions, and 3 to 4 seconds on the wrist, performing within COSC standards. Previously, moon phase models utilized quartz movements, a detail that may not appeal to mechanical watch enthusiasts. Overall, owners rate the Longines PrimaLuna Moonphase highly for its updated automatic movement and reliable timekeeping.

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