Seiko Cal. 6691 - 631

The 6691-631 is a sought-after Hand-Winding piece from Seiko's golden era. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-bbd453996cc3]

Also known as: Turtle, World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1984

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