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The Encyclopedia of Horology

Wristwatch · Quartz wristwatch

Seiko Think The Earth WN-2 Quartz Watch

Partially verified

The Seiko Think The Earth WN-2 is a quartz watch created in 2001 in collaboration with the Think the Earth Project. It features a central domed Hardlex crystal encapsulating a 1/580 million scale model of the Earth’s northern hemisphere. The miniature globe rotates once every 24 hours. Time is indicated by a silver hook-shaped hour hand and an orange minute marker moving along a 24-hour peripheral scale. The timepiece is constructed from a removable titanium and aluminum core module that can be separated from its strap and frame for use as a standalone desk clock. The watch is supplied with its original black strap, stainless steel deployant clasp, box, and instruction documentation. The auction description notes that the set is missing a secondary silver bezel component.

Front view of the Seiko Think The Earth WN-2, showing the rotating Earth globe display and the 24-hour peripheral scale.
Front view of the Seiko Think The Earth WN-2, showing the rotating Earth globe display and the 24-hour peripheral scale. — Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
craftandtailored.com
Category
Wristwatch · Quartz wristwatch
Maker / attribution
Seiko
Reference
WN-2
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
2001
Source-reported place
Japan
Source-reported serial
87XXXX

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Design and Display

The Seiko Think The Earth WN-2 features a distinct display centered on a 1/580 million scale model of the northern hemisphere. This rotating globe sits beneath a domed Hardlex crystal and completes one full rotation every 24 hours, intended to represent the Earth's actual rotation. Time is indicated by two markers: a silver hook-shaped hour indicator and a small orange minute marker that travel along a 24-hour scale printed on the peripheral bezel.

The watch is designed with a removable internal module constructed from titanium and aluminum. This core can be detached from the external strap and frame assembly, allowing the watch to function as a standalone desk clock.

Evidence for this section
  • “At the center of the watch sits a miniature 1/580 million scale model of the Earth’s northern hemisphere beneath a domed Hardlex crystal.”
  • “The globe rotates once every 24 hours”
  • “the watch’s removable titanium and aluminum core module can also be placed into a display stand and used as a standalone desk clock.”

Construction and Materials

The outer watch housing is composed of titanium and aluminum, paired with a stainless steel deployant clasp on the original black strap. The dial assembly is protected by a Hardlex crystal. The auction description notes that the titanium and aluminum case remains in a state showing little wear, and the crystal is free of marks.

The internal module contains the quartz movement and the globe display. According to the auction description, the watch has recently been serviced with a new battery and is currently keeping time. The set is noted as being incomplete due to the absence of a secondary silver bezel.

Evidence for this section
  • “The titanium and aluminum outer case remains in relatively untouched condition”
  • “The watch comes supplied on its original black strap, which is in lightly worn condition, and its original stainless steel deployant clasp.”
  • “The watch is keeping time, and it just received a new battery.”

Provenance and Documentation

This watch was produced in 2001 as part of a collaboration between Seiko and the Japanese non-profit organization Think the Earth Project. It is presented as a complete set including the original manufacturer's box and various instruction booklets. The object is catalogued with the reference number WN-2.

While the watch is documented as a complete set, the vendor explicitly states that the secondary silver bezel is not included. The serial number provided for this specific example is 87XXXX.

Evidence for this section
  • “Created in 2001 through a collaboration between Seiko and the Japanese NPO Think the Earth Project”
  • “The watch is a complete set, with its original box, instruction booklets, and desk clock display.”
  • “PLEASE NOTE: This set is missing its secondary silver bezel.”

Open research questions

  • What is the specific function of the 'secondary silver bezel' mentioned as missing?
  • Are there variations in the color of the 'Earth' model used across the WN-2 production run?

Source evidence

Recorded claims and source quotations for Seiko Think The Earth WN-2 Quartz Watch
FieldSource-reported valueSource quotation
Date of origin2001“Created in 2001 through a collaboration between Seiko and the Japanese NPO Think the Earth Project”
Case materialTitanium / Aluminum / Stainless Steel“Titanium / Aluminum / Stainless Steel”
Dial feature1/580 million scale model of Earth“At the center of the watch sits a miniature 1/580 million scale model of the Earth’s northern hemisphere”
Watch movement typeQuartz“ساعت مچی کوارتز Seiko”
Condition noteMissing secondary bezel“PLEASE NOTE: This set is missing its secondary silver bezel.”

Visible details

  • Earth model rotates on a 24-hour cycle
  • Hook-shaped hour hand and orange dot minute marker
  • Removable core module for use as a desk clock
  • Peripheral 24-hour dial scale

Research qualifications

  • Secondary silver bezel is missing from the set
  • Exact functionality of the original desk clock display stand is not fully detailed beyond module removability

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

ساعت مچی کوارتز Seiko مدل Think The Earth رفرنس WN-2

Reviewed 2026-11-02 · Record 45a2fcbef7

Terms in this record

Glossary explanations for terms named in this object’s record.

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