Side by side
Lum-Tec B64 ChronographvsSeiko Prospex Sea
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
14 of 29 specs differDiameter
B64 Chronograph44mm
Prospex Sea43.8mm
Power Reserve
B64 Chronograph40h
Prospex Sea41h
Water Resistance
B64 Chronograph100m
Prospex Sea200m
MSRP
B64 Chronograph$545
Prospex Sea$625
Full specifications
Case
6 specsCategory
Chronograph
Diver
Diameter
44mm
43.8mm
Thickness
—
12.8mm
Lug-to-Lug
51.5mm
48.7mm
Material
Titanium (DLC coated)
Stainless Steel
Water Resistance
100m
200m
Crystal & Dial
4 specsCrystal
Domed Sapphire
Sapphire
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Standard
Black
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
—
4R35
Power Reserve
40h
41h
Jewels
25
23
Pricing
1 specsMSRP
$545
$625
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