Seiko Cal. 6390 - 850

The Seiko 6390-850 represents an important milestone in Seiko's 1974 lineup. With its 22mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-4ab96f81de9d]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1974

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