Side by side
Halios Seaforth IVvsOblvlo JM Rotor
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Seaforth IV40mm
JM Rotor42mm
Power Reserve
Seaforth IV40h
JM Rotor42h
Water Resistance
Seaforth IV200m
JM Rotor50m
MSRP
Seaforth IV$765
JM Rotor$299
Full specifications
Case
6 specsCategory
Diver
Sport
Diameter
40mm
42mm
Thickness
12.4mm
13mm
Lug-to-Lug
46.5mm
46mm
Material
Titanium
Stainless Steel
Water Resistance
200m
50m
Crystal & Dial
2 specsCrystal
Sapphire (double-domed)
Sapphire
Dial Color
Blue
Black
Movement
3 specsCaliber
Sellita SW200-2
Miyota 8215
Power Reserve
40h
42h
Jewels
25
21
Pricing
1 specsMSRP
$765
$299
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