Seiko Cal. 6640 - 654

The Seiko 6640-654 represents an important milestone in Seiko's 1965 lineup. With its 18mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-8f36e67a2e6e]

Also known as: Shogun

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1965

Related Models

• Seiko 0756-746
• Seiko 6236-900
• Seiko 3844-865
• Seiko 4453-835
• Seiko 6340-523
• Seiko 6120-757
• Seiko 6296-360
• Seiko 6237-552
• Seiko 4444-562
• Seiko 4512-825
• Seiko 6611-449
• Seiko 4445-443