Seiko Cal. 4563 - 640

The Seiko 4563-640 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-ae94afa06ab9]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1965

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