Seiko Cal. 5642 - 240

The Seiko 5642-240 represents an important milestone in Seiko's 1970 lineup. Powered by the 5642 caliber with 29j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-ec1e4cf3c2c4]

Also known as: Crown, Baby Tuna

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1970

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