Seiko Cal. 4431 - 391

The Seiko 4431-391 represents an important milestone in Seiko's 1976 lineup. Powered by the 4431 caliber with 31j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-b24102ff0508]

Also known as: Shogun, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1976

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