Seiko Cal. 5681 - 138

Seiko 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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