Seiko Cal. 4578 - 736

The Seiko 4578-736 represents an important milestone in Seiko's 1982 lineup. Powered by the 4578 caliber with 32j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-932251cb80f2]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1982

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