Seiko Cal. 5666 - 343

The Seiko 5666-343 represents an important milestone in Seiko's 1968 lineup. With its 18mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-5b347d39f6ac]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1968

Related Models

• Seiko 6364-679
• Seiko 3879-749
• Seiko 4413-116
• Seiko 5266-130
• Seiko 6615-834
• Seiko 4589-965
• Seiko 0730-372
• Seiko 6244-782
• Seiko 7014-666
• Seiko 4463-915
• Seiko 4527-291
• Seiko 0729-462