Seiko Cal. 6178 - 636

The Seiko 6178-636 represents an important milestone in Seiko's 1981 lineup. Powered by the 6178 caliber with 19j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-2a04c0e290cb]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1981

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