Seiko Cal. 5681 - 816

The Seiko 5681-816 represents an important milestone in Seiko's 1971 lineup. Powered by the 5681 caliber with 25j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-75774f3bd16d]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1971

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