Which is cheaper, the Praesidus 42mm Automatic or the Seiko Astron GPS Solar 2025 Limited Edition?

At MSRP the Praesidus 42mm Automatic is the cheaper of the two at $269, against $2,900 for the Seiko Astron GPS Solar 2025 Limited Edition — a $2,631 gap before any retailer discounting.

Which is bigger, the Praesidus 42mm Automatic or the Seiko Astron GPS Solar 2025 Limited Edition?

The Seiko Astron GPS Solar 2025 Limited Edition wears larger at 43.4mm versus 38mm for the Praesidus 42mm Automatic — a 5.4mm difference across the dial.

Which has better water resistance, the Praesidus 42mm Automatic or the Seiko Astron GPS Solar 2025 Limited Edition?

The Praesidus 42mm Automatic is rated to 100m versus 10m for the Seiko Astron GPS Solar 2025 Limited Edition.

What movement does the Praesidus 42mm Automatic run compared to the Seiko Astron GPS Solar 2025 Limited Edition?

The Praesidus 42mm Automatic runs a automatic caliber (Seiko NH35), while the Seiko Astron GPS Solar 2025 Limited Edition runs a quartz (5X83).

Side by side

Praesidus 42mm AutomaticvsSeiko Astron GPS Solar 2025 Limited Edition

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

Praesidus 42mm Automatic

P-42-TR-MIC-DBRAG

MSRP $269

Seiko Astron GPS Solar 2025 Limited Edition

ssh183j1

MSRP $2,900

At a glance

14 of 29 specs differ

Diameter

42mm Automatic38mm

Astron GPS Solar 2025 Limited Edition43.4mm

Power Reserve

42mm Automatic40h

Astron GPS Solar 2025 Limited Edition40h

Water Resistance

42mm Automatic100m

Astron GPS Solar 2025 Limited Edition100m

MSRP

42mm Automatic$269

Astron GPS Solar 2025 Limited Edition$2,900

Full specifications

Case

6 specs

Crystal & Dial

4 specs

Crystal Shape

Flat

Curved

AR Coating

Inner

Super-clear coating

Dial Color

42mm Automatic

Black

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko NH35

5X83

Type

Automatic

Quartz

Jewels

Pricing

1 specs

MSRP

$269

$2,900

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