Seiko Cal. 6230 - 660

This Spring Drive model from 1974 features a 42mm PVD Black case. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-4442d3467f48]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1974

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