Seiko Cal. 5644 - 670

The Seiko 5644-670 represents an important milestone in Seiko's 1967 lineup. The Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-35a9fd2af0de]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1967

Related Models

• Seiko 6395-960
• Seiko 6250-994
• Seiko 6696-175
• Seiko 7125-103
• Seiko 0769-338
• Seiko 5215-109
• Seiko 4432-368
• Seiko 5225-802
• Seiko 6142-646
• Seiko 4527-657
• Seiko 6252-903
• Seiko 5666-409