Alexander James Watches A4 Prelude 37 GMT White SnowflakevsSeiko Seiko 5 Sports SKX series
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

A4 Prelude 37 GMT White Snowflake

Seiko 5 Sports SKX series
Diameter
37.4mm
38mm
Lug-to-Lug
n/a
44.2mm
Thickness
12.1mm
12.1mm
Water Resistance
200m
highest
100m
Power Reserve
n/a
41h
MSRP
$325
lowest
$350
Movement
Seiko NH34
Seiko 4R36
Case
3 specsDiameter
37.4mm
38mm
Lug-to-Lug
n/a
44.2mm
Water Resistance
200m
100m
Crystal & Dial
3 specsCrystal
Sapphire
Hardlex
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Seiko NH34
Seiko 4R36
Power Reserve
0h
41h
Jewels
0
24
Pricing
1 specsMSRP
$325
$350
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