Seiko Cal. 4413 - 645

The 4413-645 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-8a7fcf935cea]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1981

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