Seiko Cal. 4427 - 636

The Seiko 4427-636 represents an important milestone in Seiko's 1966 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-e249b70818ae]

Also known as: Crown, Flighty

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1966

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