Seiko Cal. 4475 - 401

The Seiko 4475-401 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-26abed2801b4]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1978

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