Side by side
Lum-Tec B64 ChronographvsGrand Seiko SBGY007
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
SBGY00738.5mm
Power Reserve
B64 Chronograph40h
SBGY00772h
Water Resistance
B64 Chronograph100m
SBGY00730m
MSRP
B64 Chronograph$545
SBGY007$8,900
Full specifications
Case
7 specsCategory
Chronograph
Dress
Diameter
44mm
38.5mm
Thickness
—
10.2mm
Lug-to-Lug
51.5mm
43.7mm
Lug Width
22mm
19mm
Material
Titanium (DLC coated)
Stainless Steel
Water Resistance
100m
30m
Crystal & Dial
3 specsCrystal
Domed Sapphire
Sapphire
AR Coating
Inner
Yes
Dial Color
Standard
Black
Movement
3 specsCaliber
—
9R31
Type
Automatic
Spring Drive
Power Reserve
40h
72h
Pricing
1 specsMSRP
$545
$8,900
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