Seiko Cal. 6642 - 920

This Spring Drive model from 1977 features a 45mm Two-Tone case. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-7fa478d6fed3]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1977

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