Seiko Cal. 4413 - 631

The 4413-631 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4413 caliber with 31j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-551324e21b55]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1978

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