Seiko Cal. 5691 - 742

The 5691-742 is a sought-after Spring Drive piece from Seiko's golden era. With its 21mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-272ce9ff607d]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1988

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