Seiko Cal. 6691 - 939

Released in 1965, the Cal. 6691 with design code 939 was part of Seiko's domestic market collection. With its 20mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-8fab5042bec3]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1965

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