Seiko Cal. 6618 - 727

This Spring Drive model from 1980 features a 38mm Titanium case. Powered by the 6618 caliber with 21j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-085dc28364a9]

Also known as: Shogun, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1980

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