Seiko Cal. 4438 - 999

This Spring Drive model from 1979 features a 45mm PVD Black case. With its 20mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-7696240dda55]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1979

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