Side by side
Castor Watches LastarriavsSeiko Prospex SPEEDTIMER Mechanical Chronograph
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
Lastarria40mm
Prospex SPEEDTIMER Mechanical Chronograph42mm
Power Reserve
Lastarria—
Prospex SPEEDTIMER Mechanical Chronograph45h
Water Resistance
Lastarria50m
Prospex SPEEDTIMER Mechanical Chronograph100m
MSRP
Lastarria—
Prospex SPEEDTIMER Mechanical Chronograph$2,500
Full specifications
Case
5 specsCategory
—
Chronograph
Diameter
40mm
42mm
Thickness
10mm
14.6mm
Lug-to-Lug
—
49.5mm
Water Resistance
50m
100m
Crystal & Dial
5 specsCrystal
Mineral
Sapphire
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
White
Black
Lume
None
LumiBrite on hands and index(es)
Movement
4 specsCaliber
—
8R48
Type
Quartz
Automatic
Power Reserve
—
45h
Jewels
25
34
Pricing
1 specsMSRP
—
$2,500
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