Model: Seiko5 6347-5000 Mechanical Moonphase
Overview:
A truly unique and obscure reference, the 6347-5000 holds a special place in Seiko’s history as its first—and only—automatic moonphase wristwatch.
History:
Released in 1986, the 6347-5000 stands apart within Seiko’s vast catalogue due to its rare complication. While Seiko has produced numerous quartz moonphase models, this remains the brand’s only known automatic moonphase, making it a highly collectible and historically significant piece.
Specifications and Condition:
Overall: Excellent
Case: Excellent
Crystal: Clean
Dial: Clean
Movement: Serviced
Bracelet/Strap: Original
Includes: Watch only
Movement:
Seiko 6347 Automatic
- Only mechanical Seiko Moonphase complication movement
- Day-date functionality
Dimensions:
34mm diameter
39.5mm lug to lug
11mm thickness
Design Details:
- Distinctive octagonal case design
- Fluted inner dial ring adding depth and texture
- Crystal marker at 12 o’clock for added visual contrast
- Moonphase display integrated into a compact, balanced layout
Closing Note:
With its combination of unconventional design and unmatched rarity as Seiko’s only automatic moonphase, the 6347-5000 is a standout piece for collectors seeking something truly different. Its obscure status and limited production make it an increasingly difficult model to source, especially in well-preserved condition.
