Seiko Cal. 5642 - 866

This Spring Drive model from 1973 features a 35mm Two-Tone case. It features a Burgundy dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-5709899454b2]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

23j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1973

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