Seiko Cal. 4435 - 640

This Spring Drive model from 1966 features a 35mm Two-Tone case. With its 21mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-51e9dd567fe9]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1966

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