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IWC Schaffhausen Iw658601 Portofino AutomaticvsOmega Constellation Observatory Co Axial Master Chronometer 39 4mm

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.

IWC Schaffhausen Iw658601 Portofino Automatic

Owners widely praise the IWC Schaffhausen Iw658601 Portofino Automatic's elegant, simple design and thin 9.4mm case, making it a versatile dress watch suitable for everyday wear. Its classical look, rounded bezel, and sunburst dial are frequently highlighted as attractive features. Some owners find the 37mm case size comfortable and appreciate its slim profile, contrary to perceptions of IWC watches being bulky. Accuracy reports vary, with one owner noting excellent timekeeping and another observing a loss of almost 10 seconds per day. The value proposition is debated, with some questioning the use of an external movement at its price point. On balance, owners and reviewers appreciate the IWC Schaffhausen Iw658601 Portofino Automatic for its classic dress watch aesthetic and wearability, though some debate its value.

Omega Constellation Observatory Co Axial Master Chronometer 39 4mm

Owners widely praise the Omega Constellation Observatory Co Axial Master Chronometer 39 4mm for its fantastic presence and discreet elegance, finding it suitable for both suits and casual wear. Reviewers highlight its reinterpretation of vintage design with a pie-pan dial, dog-leg lugs, and kite-shaped hands and indexes, noting its certification as a Master Chronometer. Some owners find the case thick and the lugs awkward, while others prefer its clean design and unique details over other models. One owner wishes to switch straps but notes Omega does not sell alternatives. On balance, owners and reviewers appreciate the Omega Constellation Observatory Co Axial Master Chronometer 39 4mm for its elegant design and Master Chronometer certification, despite some reservations about case thickness and lug design.

At a glance

13 of 29 specs differ
Diameter
Iw658601 Portofino Automatic37mm
Constellation Observatory Co Axial Master Chronometer 39 4mm39.4mm
Power Reserve
Iw658601 Portofino Automatic120h
Constellation Observatory Co Axial Master Chronometer 39 4mm60h
Water Resistance
Iw658601 Portofino Automatic50m
Constellation Observatory Co Axial Master Chronometer 39 4mm30m
MSRP
Iw658601 Portofino Automatic$16,300
Constellation Observatory Co Axial Master Chronometer 39 4mm$37,900

Full specifications

Case

7 specs
Diameter
37mm
39.4mm
Thickness
9.4mm
12.23mm
Lug-to-Lug
47.2mm
Lug Width
18mm
19mm
Material
18 Ct 5N Gold
18kt Moonshine Gold
Finish
Steel
O-MEGASTEEL
Water Resistance
50m
30m

Crystal & Dial

1 specs
Crystal Shape
Domed

Movement

4 specs
Caliber
32111
Omega 8914
Beat Rate
28,800 vph
0 vph
Power Reserve
120h
60h
Jewels
21
0

Pricing

1 specs
MSRP
$16,300
$37,900
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