Seiko Cal. 4413 - 731

Seiko 4413-731

The 4413-731 is a sought-after Quartz piece from Seiko's golden era. With its 21mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-ab5b6a0949bd]

Also known as: Bullhead

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
9.6mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
30j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1966

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