Seiko Cal. 6681 - 739

Seiko 6681-739

The Seiko 6681-739 represents an important milestone in Seiko's 1980 lineup. Powered by the 6681 caliber with 27j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-45d0804101e0]

Also known as: Bullhead, Rally

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
9.0mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
Silver
Jewels
27j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1980

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seikata-wm-45d0804101e0