Seiko Cal. 5644 - 663

This Automatic model from 1974 features a 37mm Gold-Plated case. With its 20mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-99cac31ec829]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1974

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