Seiko Cal. 5691 - 640

Released in 1982, the Cal. 5691 with design code 640 was part of Seiko's domestic market collection. It features a Silver dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-fb0ee155175b]

Also known as: Turtle, Goldfeather

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1982

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