Seiko Cal. 4415 - 637

Released in 1965, the Cal. 4415 with design code 637 was part of Seiko's domestic market collection. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-15ff256862eb]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1965

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