Seiko Cal. 5663 - 107

The Seiko 5663-107 represents an important milestone in Seiko's 1975 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-ef6dba0348b1]

Also known as: Helmet, Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1975

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