Seiko Cal. 6640 - 123

The Seiko 6640-123 represents an important milestone in Seiko's 1975 lineup. With its 20mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-644e2b16d1b6]

Also known as: Shogun, Rally

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1975

Related Models

• Seiko 7064-141
• Seiko 4475-940
• Seiko 5682-443
• Seiko 6239-270
• Seiko 7131-351
• Seiko 6112-959
• Seiko 6664-187
• Seiko 3875-545
• Seiko 4592-957
• Seiko 7169-464
• Seiko 6356-746
• Seiko 6685-297