Seiko Cal. 4574 - 632

The Seiko 4574-632 represents an important milestone in Seiko's 1975 lineup. Powered by the 4574 caliber with 17j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-76f580ddb2d7]

Also known as: Sumo, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1975

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