Seiko Cal. 5642 - 987

The 5642-987 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-635485cca8a3]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1974

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