Seiko Cal. 4456 - 603

This Spring Drive model from 1980 features a 37mm Two-Tone case. Powered by the 4456 caliber with 26j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-bcac7e086120]

Also known as: Sumo, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1980

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