Which is cheaper, the Sternglas Naos Mondphase or the Seiko Astron GPS Solar 2025 Limited Edition?

At MSRP the Sternglas Naos Mondphase is the cheaper of the two at $323, against $2,600 for the Seiko Astron GPS Solar 2025 Limited Edition — a $2,277 gap before any retailer discounting.

Which is bigger, the Sternglas Naos Mondphase or the Seiko Astron GPS Solar 2025 Limited Edition?

The Seiko Astron GPS Solar 2025 Limited Edition wears larger at 42mm versus 38mm for the Sternglas Naos Mondphase — a 4mm difference across the dial.

Which has better water resistance, the Sternglas Naos Mondphase or the Seiko Astron GPS Solar 2025 Limited Edition?

The Sternglas Naos Mondphase is rated to 50m versus 10m for the Seiko Astron GPS Solar 2025 Limited Edition.

What movement does the Sternglas Naos Mondphase run compared to the Seiko Astron GPS Solar 2025 Limited Edition?

Both watches run quartz movements — the Sternglas Naos Mondphase uses the Seiko VJ76 and the Seiko Astron GPS Solar 2025 Limited Edition uses the 3X62.

Side by side

Sternglas Naos MondphasevsSeiko Astron GPS Solar 2025 Limited Edition

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

Sternglas Naos Mondphase

naos-mondphase-mitternachtsblau

MSRP $323

Seiko Astron GPS Solar 2025 Limited Edition

ssj029j1

MSRP $2,600

At a glance

14 of 29 specs differ

Diameter

Naos Mondphase38mm

Astron GPS Solar 2025 Limited Edition42mm

Power Reserve

Naos Mondphase—

Astron GPS Solar 2025 Limited Edition40h

Water Resistance

Naos Mondphase50m

Astron GPS Solar 2025 Limited Edition100m

MSRP

Naos Mondphase$323

Astron GPS Solar 2025 Limited Edition$2,600

Full specifications

Case

7 specs

Crystal & Dial

3 specs

AR Coating

Inner

Super-clear coating

Dial Color

—

Black

Lume

Luminova Punkten

LumiBrite on hands and index(es)

Movement

3 specs

Caliber

Seiko VJ76

3X62

Power Reserve

—

40h

Jewels

—

Pricing

1 specs

MSRP

$323

$2,600

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