Seiko Cal. 4418 - 816

This Hand-Winding model from 1970 features a 40mm PVD Black case. With its 19mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-25558bbca156]

Also known as: Tuna, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1970

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