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
12 of 29 specs differDiameter
Lusitano39mm
Prospex Sea43.8mm
Power Reserve
Lusitano60h
Prospex Sea41h
Water Resistance
Lusitano100m
Prospex Sea200m
MSRP
Lusitano$350
Prospex Sea$625
Full specifications
Case
6 specsCategory
Dress
Diver
Diameter
39mm
43.8mm
Thickness
12.60mm
12.8mm
Lug-to-Lug
47mm
48.7mm
Lug Width
20mm
22mm
Water Resistance
100m
200m
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
Yes
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Miyota 8315
4R35
Power Reserve
60h
41h
Jewels
25
23
Pricing
1 specsMSRP
$350
$625
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