Seiko Cal. 5666 - 657

This Kinetic model from 1981 features a 37mm Two-Tone case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-c305eeaeddc4]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

29j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1981

Related Models

• Seiko 5284-304
• Seiko 5627-866
• Seiko 6141-439
• Seiko 6254-825
• Seiko 7077-959
• Seiko 5672-184
• Seiko 4464-665
• Seiko 5248-799
• Seiko 6210-497
• Seiko 0735-840
• Seiko 5243-335
• Seiko 6669-700