Seiko Cal. 4431 - 391

Seiko 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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