Side by side
IWC Schaffhausen Iw658601 Portofino AutomaticvsGrand Seiko SBGW306
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
Iw658601 Portofino Automatic37mm
SBGW30636.5mm
Power Reserve
Iw658601 Portofino Automatic120h
SBGW30672h
Water Resistance
Iw658601 Portofino Automatic50m
SBGW306100m
MSRP
Iw658601 Portofino Automatic$16,300
SBGW306$17,900
Full specifications
Case
7 specsDiameter
37mm
36.5mm
Thickness
9.4mm
11.7mm
Lug-to-Lug
—
42.7mm
Material
18 Ct 5N Gold
Gold
Finish
Steel
Brushed and polished
Water Resistance
50m
100m
Caseback
—
Solid
Crystal & Dial
4 specsCrystal Shape
—
Flat
AR Coating
—
Yes
Dial Color
Silver
Black
Indices
—
Applied
Movement
4 specsCaliber
32111
9S64
Type
Automatic
Manual
Power Reserve
120h
72h
Jewels
21
25
Pricing
1 specsMSRP
$16,300
$17,900
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