Side by side
Casio B640vsSeiko Prospex Rotocall
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
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At a glance
13 of 29 specs differDiameter
B64035mm
Prospex Rotocall37mm
Power Reserve
B640—
Prospex Rotocall—
Water Resistance
B64050m
Prospex Rotocall100m
MSRP
B640$80
Prospex Rotocall$550
Full specifications
Case
7 specsDiameter
35mm
37mm
Thickness
9.4mm
10.6mm
Lug-to-Lug
38.9mm
43.5mm
Lug Width
—
20mm
Material
Resin
Stainless Steel
Finish
—
—
Water Resistance
50m
100m
Crystal & Dial
3 specsCrystal
Acrylic
Hardlex
AR Coating
No
—
Dial Color
Black
—
Movement
2 specsCaliber
—
Seiko A824
Power Reserve
—
0h
Pricing
1 specsMSRP
$80
$550
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