Side by side

Fortis Marinemaster M-40vsGrand Seiko SLGC006

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
SLGC006
Grand SeikoSLGC006
MSRP $22,600

At a glance

13 of 29 specs differ
Diameter
Marinemaster M-4040mm
SLGC00643.2mm
Power Reserve
Marinemaster M-4038h
SLGC00672h
Water Resistance
Marinemaster M-40300m
SLGC006100m
MSRP
Marinemaster M-40$3,520
SLGC006$22,600

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
40mm
43.2mm
Thickness
13mm
15.4mm
Lug-to-Lug
51.5mm
Lug Width
21mm
23mm
Material
Stainless Steel
Gold
Water Resistance
300m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
Orange
Black

Movement

3 specs
Caliber
Sellita SW220-1
9SC5
Power Reserve
38h
72h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$22,600

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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.

Grand Seiko SLGC006

Owners widely praise the Grand Seiko SLGC006's stunning copper Mount Iwate dial and its high-frequency Caliber 9SC5 movement, which operates at 36,000vph and achieves accuracy between -3/+5 seconds per day with a 72-hour power reserve. Reviewers note the watch's large 43.2mm size, though some find the Evolution 9 case design improves wearability. Criticisms include the $22,600 price point, the 4:30 date window placement, and the lack of bracelet micro-adjustment. Opinions on the dial are split, with some finding it beautiful and others comparing it to rust or the Australian outback. Some question the extent of the gold accents for a "two-tone" designation. Overall, owners and reviewers acknowledge the Grand Seiko SLGC006's striking aesthetics and advanced movement, but debate its value proposition and certain design choices.

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