Side by side
Lum-Tec B64 ChronographvsSeiko Prospex SPEEDTIMER Mechanical
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
B64 Chronograph44mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
B64 Chronograph40h
Prospex SPEEDTIMER Mechanical72h
Water Resistance
B64 Chronograph100m
Prospex SPEEDTIMER Mechanical200m
MSRP
B64 Chronograph$545
Prospex SPEEDTIMER Mechanical$995
Full specifications
Case
6 specsDiameter
44mm
39.5mm
Thickness
—
12mm
Lug-to-Lug
51.5mm
44.5mm
Lug Width
22mm
20mm
Material
Titanium (DLC coated)
Stainless Steel
Water Resistance
100m
200m
Crystal & Dial
5 specsCrystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Standard
Black
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
—
6R55
Power Reserve
40h
72h
Jewels
25
24
Pricing
1 specsMSRP
$545
$995
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