Side by side

Fortis Marinemaster M-40vsIWC Schaffhausen Iw459403 Portofino Automatic Moon Phase

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

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.

From video reviewers

The watch's Swiss Made construction and robust design are consistently praised. Reviewers noted the bracelet as a potential point of contention.

IWC Schaffhausen Iw459403 Portofino Automatic Moon Phase

Owners widely praise the IWC Schaffhausen Portofino for its stunning and elegant design, with many finding the 40mm size wearability excellent, even on smaller wrists. The clean dial and classical sophistication are frequently highlighted, and some owners describe it as a "lifetime watch." One owner notes their watch keeps excellent time, with another mentioning IWC's commitment to chronometer standards. A different Portofino 37 variant was reported to lose almost 10 seconds a day. On balance, owners and reviewers rate the IWC Schaffhausen Portofino highly for its elegant design and comfortable wearability.

At a glance

16 of 29 specs differ
Diameter
Marinemaster M-4040mm
Iw459403 Portofino Automatic Moon Phase40mm
Power Reserve
Marinemaster M-4038h
Iw459403 Portofino Automatic Moon Phase50h
Water Resistance
Marinemaster M-40300m
Iw459403 Portofino Automatic Moon Phase30m
MSRP
Marinemaster M-40$3,520
Iw459403 Portofino Automatic Moon Phase$7,700

Full specifications

Case

6 specs
Category
Diver
Moonphase
Thickness
13mm
11.1mm
Lug Width
21mm
20mm
Finish
Brushed and polished
18 ct 5N gold
Water Resistance
300m
30m
Caseback
Solid

Crystal & Dial

5 specs
Crystal
Sapphire
Crystal Shape
Flat
AR Coating
Inner
Dial Color
Orange
Silver
Indices
Applied

Movement

4 specs
Caliber
Sellita SW220-1
35800
Power Reserve
38h
50h
Jewels
26
25
Complications
None
Moonphase

Pricing

1 specs
MSRP
$3,520
$7,700
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