Seiko Cal. 5642 - 587

The Seiko 5642-587 represents an important milestone in Seiko's 1984 lineup. Powered by the 5642 caliber with 32j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-4cccc0abf140]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1984

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