Seiko Cal. 6690 - 191

This Spring Drive model from 1972 features a 40mm PVD Black case. Powered by the 6690 caliber with 18j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-344da626df4e]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1972

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