Seiko Cal. 6391 - 136

Released in 1983, the Cal. 6391 with design code 136 was part of Seiko's domestic market collection. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-16a5e2bf27ad]

Also known as: Turtle, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1983

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