Side by side

Fortis Marinemaster M-40vsSeiko King Seiko KS1969

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
King Seiko KS1969
SeikoKing Seiko KS1969
MSRP $3,100

At a glance

12 of 29 specs differ
Diameter
Marinemaster M-4040mm
King Seiko KS196939.4mm
Power Reserve
Marinemaster M-4038h
King Seiko KS196945h
Water Resistance
Marinemaster M-40300m
King Seiko KS196950m
MSRP
Marinemaster M-40$3,520
King Seiko KS1969$3,100

Full specifications

Case

6 specs
Category
Diver
Dress
Diameter
40mm
39.4mm
Thickness
13mm
9.9mm
Lug-to-Lug
43.6mm
Lug Width
21mm
19mm
Water Resistance
300m
50m

Crystal & Dial

3 specs
Crystal Shape
Flat
Box
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Orange
Black

Movement

2 specs
Caliber
Sellita SW220-1
6L35
Power Reserve
38h
45h

Pricing

1 specs
MSRP
$3,520
$3,100

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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 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.

Seiko King Seiko KS1969

The King Seiko KS1969 is praised for its Grand Seiko-level finishing and a slim 9.9mm case, with one owner noting it is indistinguishable from new and includes original packaging. However, the $3,100-$3,200 price point is widely questioned, with some finding the looks pedestrian and the branding jarring. Accuracy from the 6L35 movement is noted as +15/-10 seconds per day, and some owners feel the new case shape, dial colors, and end links deviate from the classic KS aesthetic. On balance, owners and reviewers are divided on the King Seiko KS1969, with the high price and modern design choices being the primary points of contention.

From video reviewers

The slim case profile under 10mm and compact lug-to-lug dimensions provide a comfortable fit. The dial's modern appeal and the collection's homage to vintage pieces are highlighted. Reviewers did not reach a consensus on any weaknesses or points of disagreement.

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