Side by side

Lum-Tec B64 ChronographvsGrand Seiko SBGM245

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

B64 Chronograph
Lum-TecB64 Chronograph
MSRP $545
SBGM245
Grand SeikoSBGM245
MSRP $6,100

At a glance

13 of 29 specs differ
Diameter
B64 Chronograph44mm
SBGM24540.5mm
Power Reserve
B64 Chronograph40h
SBGM24572h
Water Resistance
B64 Chronograph100m
SBGM245200m
MSRP
B64 Chronograph$545
SBGM245$6,100

Full specifications

Case

7 specs
Category
Chronograph
GMT
Diameter
44mm
40.5mm
Thickness
—
14.4mm
Lug-to-Lug
51.5mm
48.6mm
Lug Width
22mm
20mm
Material
Titanium (DLC coated)
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

3 specs
Crystal
Domed Sapphire
Sapphire
AR Coating
Inner
Yes
Dial Color
Standard
Black

Movement

2 specs
Caliber
—
9S66
Power Reserve
40h
72h

Pricing

1 specs
MSRP
$545
$6,100

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