Seiko Cal. 6647 - 636

This Spring Drive model from 1990 features a 46mm PVD Black case. Powered by the 6647 caliber with 29j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-c092792a38a5]

Also known as: Turtle, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1990

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