Seiko Cal. 6615 - 640

The Seiko 6615-640 represents an important milestone in Seiko's 1977 lineup. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-9f495de8d65c]

Also known as: Rally, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1977

Related Models

• Seiko 0726-786
• Seiko 6180-693
• Seiko 0766-340
• Seiko 3880-181
• Seiko 6665-343
• Seiko 6374-957
• Seiko 6192-131
• Seiko 6310-346
• Seiko 5223-117
• Seiko 4547-458
• Seiko 4544-314
• Seiko 5637-999