Seiko Cal. 6642 - 420

The Seiko 6642-420 represents an important milestone in Seiko's 1974 lineup. It features a White dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-925bbf07cbb2]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1974

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