Seiko Cal. 6640 - 616

The Seiko 6640-616 represents an important milestone in Seiko's 1980 lineup. With its 22mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-114852057650]

Also known as: Bellmatic, World Timer

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1980

Related Models

• Seiko 7025-759
• Seiko 5227-157
• Seiko 6639-844
• Seiko 6238-558
• Seiko 5656-489
• Seiko 4484-728
• Seiko 5643-171
• Seiko 7145-672
• Seiko 7135-916
• Seiko 4590-302
• Seiko 5644-936
• Seiko 6648-405