Seiko Cal. 6640 - 773

This Spring Drive model from 1969 features a 36mm Two-Tone case. It features a White dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-fe31ff8fbe11]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1969

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