Seiko Cal. 6240 - 397

The Seiko 6240-397 represents an important milestone in Seiko's 1981 lineup. Powered by the 6240 caliber with 35j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-fed29f146c6d]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1981

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