Which is cheaper, the Praesidus 38mm Automatic or the Seiko Astron GPS Solar 2026 Limited Edition?

At MSRP the Praesidus 38mm Automatic is the cheaper of the two at $680, against $2,400 for the Seiko Astron GPS Solar 2026 Limited Edition — a $1,720 gap before any retailer discounting.

Which is bigger, the Praesidus 38mm Automatic or the Seiko Astron GPS Solar 2026 Limited Edition?

The Seiko Astron GPS Solar 2026 Limited Edition wears larger at 41.2mm versus 38mm for the Praesidus 38mm Automatic — a 3.2mm difference across the dial.

Which has better water resistance, the Praesidus 38mm Automatic or the Seiko Astron GPS Solar 2026 Limited Edition?

The Praesidus 38mm Automatic is rated to 100m versus 10m for the Seiko Astron GPS Solar 2026 Limited Edition.

What movement does the Praesidus 38mm Automatic run compared to the Seiko Astron GPS Solar 2026 Limited Edition?

The Praesidus 38mm Automatic runs a automatic caliber (Seiko NH35), while the Seiko Astron GPS Solar 2026 Limited Edition runs a quartz (3X62).

Side by side

Praesidus 38mm AutomaticvsSeiko Astron GPS Solar 2026 Limited Edition

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

Praesidus 38mm Automatic

P-38-HP-GRSG

MSRP $680

Seiko Astron GPS Solar 2026 Limited Edition

ssj039j1

MSRP $2,400

At a glance

13 of 29 specs differ

Diameter

38mm Automatic38mm

Astron GPS Solar 2026 Limited Edition41.2mm

Power Reserve

38mm Automatic40h

Astron GPS Solar 2026 Limited Edition40h

Water Resistance

38mm Automatic100m

Astron GPS Solar 2026 Limited Edition100m

MSRP

38mm Automatic$680

Astron GPS Solar 2026 Limited Edition$2,400

Full specifications

Case

6 specs

Crystal & Dial

3 specs

AR Coating

Inner

Super-clear coating

Dial Color

38mm Automatic

Black

Lume

None

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko NH35

3X62

Type

Automatic

Quartz

Jewels

Pricing

1 specs

MSRP

$680

$2,400

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