Side by side
Borealis Watch Co. LusitanovsSeiko Prospex Sea
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Lusitano39mm
Prospex Sea43.5mm
Power Reserve
Lusitano60h
Prospex Sea70h
Water Resistance
Lusitano100m
Prospex Sea200m
MSRP
Lusitano$350
Prospex Sea$1,500
Full specifications
Case
7 specsCategory
Dress
Diver
Diameter
39mm
43.5mm
Thickness
12.60mm
13.3mm
Lug-to-Lug
47mm
51mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium
Water Resistance
100m
200m
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
Yes
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Miyota 8315
6R35
Power Reserve
60h
70h
Jewels
25
24
Pricing
1 specsMSRP
$350
$1,500
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