Seiko Cal. 4438 - 727

This Spring Drive model from 1965 features a 39mm Two-Tone case. With its 19mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-e3ba20310eb9]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1965

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