Seiko Cal. 6640 - 823

This Solar model from 1989 features a 40mm PVD Black case. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-108161493742]

Also known as: Navigator

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1989

Related Models

• Seiko 0710-296
• Seiko 6287-199
• Seiko 6174-708
• Seiko 3880-928
• Seiko 7134-427
• Seiko 6252-664
• Seiko 6392-897
• Seiko 4464-717
• Seiko 6180-437
• Seiko 4480-704
• Seiko 6657-118
• Seiko 7049-863