Seiko Cal. 5681 - 405

The Seiko 5681-405 represents an important milestone in Seiko's 1973 lineup. Powered by the 5681 caliber with 30j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-6054999df7d4]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1973

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