Seiko Cal. 4578 - 391

This Hand-Winding model from 1978 features a 39mm Titanium case. With its 19mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-dabefe1ca56f]

Also known as: Navigator, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

26j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1978

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