Seiko Cal. 4578 - 304

The Seiko 4578-304 represents an important milestone in Seiko's 1986 lineup. Powered by the 4578 caliber with 28j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-d5344d79a8d0]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1986

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