Seiko Cal. 6636 - 857

This Spring Drive model from 1977 features a 44mm Hardlex-Coated Steel case. Powered by the 6636 caliber with 19j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-75a176f080dd]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

40m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1977

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