Seiko Cal. 6661 - 231

The Seiko 6661-231 represents an important milestone in Seiko's 1966 lineup. It features a Black dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-c8ae9230a37d]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1966

Related Models

• Seiko 4415-843
• Seiko 3896-958
• Seiko 7079-237
• Seiko 6692-887
• Seiko 4580-201
• Seiko 5653-588
• Seiko 6381-975
• Seiko 3882-381
• Seiko 7099-933
• Seiko 5678-746
• Seiko 6312-989
• Seiko 7079-662