Seiko Cal. 5681 - 816

Seiko 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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seikata-wm-75774f3bd16d