Side by side

Sinn 534 Mother-of-Pearl WvsFortis Marinemaster M-40

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

534 Mother-of-Pearl W
Sinn534 Mother-of-Pearl W
MSRP $2,230
Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520

At a glance

15 of 29 specs differ
Diameter
534 Mother-of-Pearl W34mm
Marinemaster M-4040mm
Power Reserve
534 Mother-of-Pearl W42h
Marinemaster M-4038h
Water Resistance
534 Mother-of-Pearl W100m
Marinemaster M-40300m
MSRP
534 Mother-of-Pearl W$2,230
Marinemaster M-40$3,520

Full specifications

Case

7 specs
Category
Tool
Diver
Diameter
34mm
40mm
Thickness
9mm
13mm
Lug Width
18mm
21mm
Finish
Brushed and polished
Water Resistance
100m
300m
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Underside
Inner
Dial Color
White
Orange
Lume
Luminescent
None

Movement

3 specs
Caliber
SW 300-1
Sellita SW220-1
Power Reserve
42h
38h
Jewels
25
26

Pricing

1 specs
MSRP
$2,230
$3,520

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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.

Sinn 534 Mother-of-Pearl W

Owners widely praise the Sinn 534 Mother-of-Pearl W for its excellent timekeeping, consistently reporting accuracy around -1s/day, and the high quality of its bracelet, which features an impressive butterfly clasp. The double-AR coated crystal is noted for its near-invisibility, enhancing the dial's appearance. However, some find the 34mm case size and 18mm lug width too small for wrists 7.5 inches or larger, while others appreciate its vintage-like proportions. The mother-of-pearl dial is described as subtle, appearing gray most of the time with only occasional flashes of color, which some feel contributes to its tool-watch aesthetic. The crown is noted as potentially bothersome if the watch is worn loosely. On balance, owners rate the Sinn 534 Mother-of-Pearl W highly for its subtle dial execution and robust build quality, particularly appreciating its precise timekeeping and refined bracelet.

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.

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