Side by side

Fortis Marinemaster M-40vsLongines LONGINES SPIRIT FLYBACK

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

Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520
LONGINES SPIRIT FLYBACK
LonginesLONGINES SPIRIT FLYBACK
MSRP $5,000

At a glance

11 of 29 specs differ
Diameter
Marinemaster M-4040mm
LONGINES SPIRIT FLYBACK42mm
Power Reserve
Marinemaster M-4038h
LONGINES SPIRIT FLYBACK40h
Water Resistance
Marinemaster M-40300m
LONGINES SPIRIT FLYBACK100m
MSRP
Marinemaster M-40$3,520
LONGINES SPIRIT FLYBACK$5,000

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
40mm
42mm
Thickness
13mm
17mm
Lug-to-Lug
49.5mm
Lug Width
21mm
22mm
Water Resistance
300m
100m

Crystal & Dial

1 specs
Dial Color
Orange
Black

Movement

3 specs
Caliber
Sellita SW220-1
L791.4
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$5,000

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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 Marinemaster M-40

Owners praise the Fortis Amber Orange for its gorgeous appearance and strong wrist presence, noting its crazy lume and 70-hour power reserve. The Doxa SUB 300T, described as having a superb, eccentric design with a highly legible dial and functional no-decompression bezel, uses an ETA 2824-2 movement. However, the SUB 300T's 42.5mm case wears large and its 14mm thickness is not ideal for dress shirts, though it boasts 1,200m water resistance. On balance, owners appreciate the Fortis Amber Orange for its striking aesthetics and impressive lume.

LONGINES SPIRIT FLYBACK

Owners widely praise the Longines Spirit Flyback for its attractive design, well-finished titanium case, and value as a chronometer-certified flyback chronograph. Specific positive notes include its fun and useful flyback function for cooking, and the perceived adventure-ready, indestructible feel of the titanium model. However, reviewers and owners consistently flag its 17mm thickness as a significant detractor from wearability, with some finding it too chunky for daily wear. There is also a split opinion on the dial design, with some preferring the older five-star motif and gold hands/markers, while others appreciate the cleaner, simplified dial and cutoff numerals. The Longines Spirit Flyback is priced around $5,350-$6,500 USD. Overall, owners and reviewers rate the Longines Spirit Flyback highly for its flyback chronograph complication and attractive design, despite widespread concerns about its thickness.

From video reviewers

The Spirit Flyback's heritage-inspired design is a notable strength, with a distinctive look reminiscent of the original Flyback Chronograph. The watch's price point is somewhat high compared to its competitors, which might be a drawback for some buyers. Reviewers disagree on the watch's design, with one reviewer feeling it needed more of an edge to stand out in the Spirit collection, while another praises its heritage-inspired style.

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