Seiko Cal. 6691 - 964

The 6691-964 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-dc3646972f39]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1978

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