Side by side
Casio EFS-S650DvsSeiko Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
EFS-S650D40.9mm
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition42mm
Power Reserve
EFS-S650D—
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition—
Water Resistance
EFS-S650D100m
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition100m
MSRP
EFS-S650D$250
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition$2,400
Full specifications
Case
5 specsDiameter
40.9mm
42mm
Thickness
11.7mm
12.9mm
Lug-to-Lug
46.7mm
49.6mm
Lug Width
—
20mm
Finish
—
—
Crystal & Dial
4 specsCrystal Shape
—
Curved
AR Coating
Yes
Super-clear coating
Dial Color
Black
—
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
—
Seiko 5X83
Power Reserve
—
0h
Jewels
0
14
Pricing
1 specsMSRP
$250
$2,400
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