Seiko Cal. 6658 - 527

This Hand-Winding model from 1978 features a 34mm Hardlex-Coated Steel case. Powered by the 6658 caliber with 25j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-533a76a7d260]

Also known as: Sumo, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1978

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