Seiko Cal. 6164 - 687

The Seiko 6164-687 represents an important milestone in Seiko's 1975 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-2a5d38b54f86]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1975

Related Models

• Seiko 5650-275
• Seiko 6392-330
• Seiko 6191-126
• Seiko 6292-461
• Seiko 0720-873
• Seiko 6654-525
• Seiko 5213-920
• Seiko 7111-531
• Seiko 6332-631
• Seiko 7061-884
• Seiko 3877-730
• Seiko 4556-612