Side by side

Seiko Prospex SeavsUndone 420 Cali Automatic

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

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Prospex Sea
SeikoProspex Sea
MSRP $595
See the full Prospex Sea
420 Cali Automatic
Undone420 Cali Automatic
MSRP $340
See the full 420 Cali Automatic
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At a glance

13 of 29 specs differ
Diameter
Prospex Sea41.7mm
420 Cali Automatic40mm
Power Reserve
Prospex Sea41h
420 Cali Automatic—
Water Resistance
Prospex Sea200m
420 Cali Automatic100m
MSRP
Prospex Sea$595
420 Cali Automatic$340

Full specifications

Case

6 specs
Category
Diver
—
Diameter
41.7mm
40mm
Thickness
12.3mm
0mm
Lug-to-Lug
49.5mm
0mm
Lug Width
20mm
0mm
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Hardlex
—
Dial Color
—
—
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
4R35
Seiko NH35
Power Reserve
41h
—
Jewels
23
0

Pricing

1 specs
MSRP
$595
$340
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