Seiko Cal. 5681 - 138

The Seiko 5681-138 represents an important milestone in Seiko's 1967 lineup. Powered by the 5681 caliber with 21j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-d10169c5ff16]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1967

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