Seiko Cal. 6690 - 288

This Spring Drive model from 1980 features a 44mm PVD Black case. Powered by the 6690 caliber with 21j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-5a6cf862ed2f]

Also known as: Turtle, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1980

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