Seiko Cal. 3813 - 307

This Automatic model from 1974 features a 41mm PVD Black case. With its 20mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-e9a964ec4402]

Also known as: Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1974

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