Seiko Cal. 4478 - 721

Released in 1975, the Cal. 4478 with design code 721 was part of Seiko's domestic market collection. With its 22mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-0da470ce0aaf]

Also known as: Bellmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1975

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