Seiko Cal. 4427 - 645

Released in 1969, the Cal. 4427 with design code 645 was part of Seiko's domestic market collection. With its 18mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-e6be21963eaa]

Also known as: Sea Horse, Flighty

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1969

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