Seiko Cal. 6640 - 689

This Hand-Winding model from 1969 features a 42mm Two-Tone case. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-61dd44008aa7]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1969

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