Seiko Cal. 3820 - 928

This Automatic model from 1978 features a 39mm Stainless Steel case. With its 20mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-a70ebc37bd2a]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1978

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