Seiko Cal. 4431 - 376

This Hand-Winding model from 1977 features a 43mm Gold-Plated case. With its 18mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-638eaba27cd4]

Also known as: Tuna, Emperor

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1977

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